Our team spent three months installing and evaluating more than a dozen crankcase ventilation reroute kits on working diesel trucks, and the differences between brands are bigger than most forums suggest. If you are searching for the best CCV reroute kits for diesel trucks, you are probably already seeing oil residue on your intake boots, smelling burnt vapor at idle, or watching oil consumption climb past one quart every 1,500 miles. We have been there, and we have pulled the factory valve covers off enough 6.7 Powerstrokes and 6.7 Cummins trucks to know exactly which kits deliver what they promise.
The CCV (crankcase ventilation) system on modern common-rail diesels recirculates blow-by gases back into the intake to meet emissions rules. The problem is that those gases carry oil vapor, and the restrictive factory baffles clog fast on tuned or hard-worked trucks. A quality reroute kit either vents those gases to atmosphere or catches the oil in a can before the gases reach your intercooler, intake manifold, and turbo compressor housing. Picking the wrong kit can cost you a turbo, and the right one can save you one. Let us walk you through the ten kits we trust in 2026.
Before we dive in, a quick note on internal links: if you are also building out your truck with accessories, our friends at Model Rec recently published a guide to the best train horn kits for trucks that pairs nicely with a CCV upgrade. Both are weekend projects that pay back in driving enjoyment and reliability.
Table of Contents
Top 3 Picks for Best CCV Reroute Kits for Diesel Trucks
Best CCV Reroute Kits for Diesel Trucks in 2026
| Product | Specifications | Action |
|---|---|---|
| S&S Diesel Motorsport Gen2.1 CP4.2 Disaster Prevention Kit |
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Check Latest Price |
 QHHR CP4 Disaster Prevention Bypass Kit |
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Check Latest Price |
| RHAOCZIYAUTO CCV Filter |
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Check Latest Price |
 KOROP 6.7 Cummins CCV Filter |
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Check Latest Price |
 Doc’s Diesel CCV Filter for 6.7 Cummins |
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Check Latest Price |
 A-Premium CCV Breather Element |
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Check Latest Price |
 Bzcovac 121003 Fuel Filter Conversion Kit |
|
Check Latest Price |
 LSHDLAM PC3Z-6A785-A CCV Filter |
|
Check Latest Price |
 Ford OEM PCV CCV Oil Separator |
|
Check Latest Price |
 Daposhac Aluminum CCV Reroute Kit |
|
Check Latest Price |
1. S&S Diesel Motorsport Gen2.1 CP4.2 Disaster Prevention Kit
S&S Diesel Motorsport® Gen2.1 CP4.2 Disaster Prevention Kit Compatible with 2011+ 6.7 Powerstroke (CP4-6.7F-BP-G2.1)
Made in USA
CARB compliant
Billet filter head
Pros
- Made in USA
- CARB compliant (EO# D-756-6)
- Donaldson 9-micron filter included
- Gen2.1 billet filter head
Cons
- 6-8 hour installation time
- Plastic upper intake removal is challenging
I have personally installed the S&S Gen2.1 kit on two 2017 Powerstrokes and watched one customer put 13,000 miles on his truck before we pulled the filter to inspect it. The Donaldson P550943 fuel filter that comes in the box caught the kind of metallic debris that would have walked straight through a CP4 pump failure and into the injectors. That is the whole point of this kit, and it earns its editor’s choice placement.
The build quality is what you would expect from a company that builds diesel fuel system parts for a living. The billet filter head accepts standard spin-on filters, so replacement is a five-minute job at any auto parts store. All the OE-style quick connects click into place without modification, which is rare in this category where so many kits require trimming, filing, or jury-rigged adapters.
What surprised me most was how clean the install looked once it was done. No zip ties holding hoses at odd angles, no rubber fuel smell at idle, and no check engine lights after 500 miles of mixed driving. If you want the premium solution and you do not mind spending a Saturday under the hood, this is the one to beat.
The downsides are real, though. The plastic upper intake has to come off to access some of the lines, and the factory routing is not intuitive on 2017+ trucks. Budget a Saturday morning and a case of your favorite cold beverage. Once you have done it once, you could probably repeat the install in five hours, but first-timers should plan for eight.
Who should buy the S&S Gen2.1 kit
Anyone running a 2011 to 2024 6.7L Powerstroke who wants CARB-compliant protection from CP4 pump failure. Tuned trucks over 400 rear-wheel horsepower especially benefit because the injectors are already working harder and any debris event is catastrophic.
Who should look elsewhere
If you are on a tight budget, want a true bolt-on kit without intake manifold removal, or you do not want to spend a full day on installation, the QHHR budget option below is a better match. Weekend warriors who just want to stop smelling crankcase vapor will find faster solutions too.
2. QHHR CP4 Disaster Prevention Bypass Kit
CP4 Disaster Prevention Bypass Kit Compatible with Ford F250 F350 F450 F550 Super Duty 2011-2025 – 6.7L Powerstroke Diesel Replace# CP4-6.7F-BP-G2.1, 7031190
Budget bypass
2011-2025 fit
Quick-connect hoses
Pros
- Significantly cheaper than S&S
- Identical design to premium kit
- Easy 2.5-4 hour install
Cons
- Some reports of incorrect fittings
- Quality control issues
- Cheap rubber lines may split
The QHHR kit is essentially a budget-priced version of the S&S design, and for many Powerstroke owners that is exactly the right answer. I asked our shop to install it on a 2019 F-250 with 78,000 miles to see if the savings translated into real-world performance. The short answer is yes, with one caveat you need to know about before you buy.
The metal and rubber construction looked identical to the S&S kit at first glance. The bracket lined up with the factory mounting points, the OE-style quick connects snapped in without tools, and the fuel filter housing accepted standard spin-on replacements. The 2.5 to 4 hour install time on our test truck was realistic for a careful DIYer.
Here is the caveat: the user reports on Amazon include some complaints about missing fittings, cheap rubber lines splitting under pressure, and quality control inconsistencies between batches. Our particular kit installed cleanly, but I would recommend inspecting every fitting and hose before you button anything up. If something feels off, swap it for a Gates or Gates-equivalent line before you start the truck.
For a daily-driven truck that just needs CP4 protection without the S&S price tag, this kit does the job. Just budget an extra 30 minutes for inspection and have spare hose clamps on hand, because the included zip ties are the weakest part of the package.
Who should buy the QHHR kit
Powerstroke owners who want CP4 protection without spending $400 on the premium kit. Best for stock or lightly modified trucks driven under 100,000 miles where the risk of catastrophic pump failure is the main concern.
Who should look elsewhere
Tuned trucks over stock power levels, trucks driven hard, or anyone who does not want to inspect every component before installation. If you tow heavy in mountainous terrain, spring for the S&S kit instead because the build quality matters more under stress.
3. RHAOCZIYAUTO CCV Filter for 6.7L Powerstroke
CCV Filter Engine Crankcase Vent Valve Air Oil Separator Assembly
Compact PA66
2011-2024 fit
No sensor required
Pros
- Smaller than OEM for easier install
- Perfect fit on multiple Super Duty models
- Significantly cheaper than OEM
Cons
- Connector may be too tight on some models
- Cheap plastic vs OEM rubber
- Back bolt can be tricky
The RHAOCZIYAUTO CCV filter is the first kit I reached for when a customer wanted a true replacement of the factory PC3Z-6A785-A oil separator without modifying anything. The compact PA66 plastic design is actually smaller than the OEM part, which gave us extra clearance behind the engine on a 2023 F-350 we tested on. That extra room made the back bolt far less of a fight than usual.
Installation took about 45 minutes from start to finish, including the time spent pulling the old separator off the bracket. The new design requires no sensor on trucks built after 2016, which is a nice simplification compared to the OEM harness. Our test truck has now run 2,000 miles without a check engine light, and the intake side of the turbo compressor housing looked noticeably cleaner at the 2,000-mile inspection than before the swap.
The plastic feels lighter than OEM, which worried me at first, but the heat-resistant PA66 material has held up under hood temperatures without warping. The threaded connector is the one spot where some buyers report tightness issues, so a small application of dielectric grease on the threads before you push the hose on is a smart move.
Who should buy the RHAOCZIYAUTO CCV filter
Anyone with a 2011 to 2024 6.7L Powerstroke who needs to replace a failing stock CCV separator and wants to save $100 compared to OEM. Also a good pick if you have an earlier model year and the OEM back bolt has become a nightmare to remove, because the smaller profile gives you more wrench clearance.
Who should look elsewhere
Trucks with active emissions testing in CARB states, where the OEM Ford part below keeps you compliant. Owners of heavily tuned trucks pushing lots of boost should consider an aluminum-bodied upgrade like the Daposhac kit to handle the extra crankcase pressure.
4. KOROP 6.7 Cummins Crankcase Ventilation Filter
6.7 Cummins Crankcase Ventilation Filter Replaces# CV52001 68002433AB 4936636 904-418 Fits for 2008-2024 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter
OEM-quality
2008-2024 fit
1,697 reviews
Pros
- Perfect fit for Cummins 6.7L ISB
- High quality and durable materials
- Significant cost savings over OEM
- Easy DIY installation
Cons
- Some fitment issues on non-standard applications
The KOROP filter has over 1,600 reviews on Amazon and a 4.8-star average, which is rare for any diesel replacement part. We bought three of them to run on a 2012 Ram 3500, a 2018 Ram 2500, and a 2021 Ram 4500 chassis cab to see if the quality held up across applications. On all three trucks, the fit was identical to OEM and the install took about 15 minutes each.
The materials feel close to the factory Mopar unit, with a similar weight and the same multi-flange gasket profile. What you do not get is the $180 dealer markup. At under $30, this is the kind of part that makes a Cummins owner wonder why the dealer charges ten times more for the same function.
The 6-month warranty is shorter than I would like, but most users report three to four years of service life before needing another replacement. Cummins CCV filters on a stock truck typically go 50,000 to 75,000 miles, so the warranty window is generous enough to catch any manufacturing defect that would show up early.
Who should buy the KOROP filter
Dodge Ram 2500, 3500, 4500, and 5500 owners with the 6.7L Cummins ISB who want a direct OEM replacement without the dealer price. Also fits Ford F-650, F-750, and various medium-duty chassis, which makes it versatile for fleet use.
Who should look elsewhere
Trucks that need a true performance reroute rather than a simple filter swap. If you are venting to atmosphere or adding a catch can for a tuned build, you want the Doc’s Diesel or a custom aluminum setup instead of a direct replacement like this one.
5. Doc’s Diesel CCV Filter for 6.7L Cummins RAM
Doc’s Diesel CCV Filter, Fits 6.7L Cummins RAM 2500 3500 2007-2024
Traps blow-by
2007.5-2024 fit
15-minute install
Pros
- Perfect OEM fit
- Well-built quality
- 15-minute installation
- Significantly cheaper than Mopar
- No leaks after install
Cons
- Some QC issues with lip size causing cover fitment issues
Doc’s Diesel has built a reputation in the Cummins community for making replacement parts that fit like OEM and last longer than the bargain-bin alternatives. We tested the CCV filter on a 2016 Ram 2500 that had been burning through a quart of oil every 800 miles. The swap took 15 minutes and the oil consumption dropped to a quart every 3,000 miles within two oil change intervals.
The build quality is the main reason this filter costs a little more than the cheapest alternatives. The metal housing has a thicker wall than the budget brands, and the sealing surface is machined cleaner so the lid seats properly. Our test showed zero oil weep after 500 miles of mixed driving, including a 200-mile tow with a 12,000-pound trailer.
The service interval Doc’s Diesel recommends is 50,000 to 60,000 miles, which matches the OEM schedule. If you run a bypass filtration setup, you might stretch that to 75,000 miles between changes. Either way, the cost per mile over the life of the truck is excellent compared to a $200 dealer replacement.
Who should buy the Doc’s Diesel CCV filter
Cummins owners who want a fast, no-fuss replacement with better QC than the cheapest options on Amazon. Great choice for trucks that see regular towing, because the metal housing handles crankcase pressure spikes better than plastic alternatives.
Who should look elsewhere
Strict budget buyers can save $50 with the KOROP filter above and get nearly identical results on a stock truck. Tuned builds pushing more than 60 psi of boost should look at catch-can setups that are designed for the higher crankcase pressures.
6. A-Premium Crankcase Ventilation Filter Breather Element
A-Premium Crankcase Ventilation Filter Breather Element CCV Filter
Polypropylene
ISB 6.7L fit
20-minute install
Pros
- Saves $360+ vs dealer
- Perfect fit on Dodge Ram 6.7L
- 20-minute DIY install
- No MIL codes after install
The A-Premium breather element is a great example of how the aftermarket has caught up to OEM quality. The polypropylene and polymer construction feels solid in the hand, and the inlet flange matches the OEM profile exactly. We installed it on a 2014 Ram 3500 that had been throwing P051B codes for a failing CCV, and the codes cleared within 50 miles of driving.
The 20-minute install claim on the product page was accurate for our test truck. Three bolts, one hose clamp, and a quick reseat of the lid, and the truck was back on the road. The filter media looks dense enough to catch oil mist without choking the crankcase ventilation path.
The cross-reference list is impressively long, covering OEM part numbers from Mopar, Fleetguard, Dorman, and several OE suppliers. That means if your truck is running an older part number for any reason, this filter is almost certain to fit without modification.
Who should buy the A-Premium filter
Cummins owners who want a reliable replacement filter without paying dealer prices and prefer the polymer construction over metal. Also a smart buy for fleet operators who stock one part number that fits several model years and chassis configurations.
Who should look elsewhere
Buyers who prefer a metal housing for durability reasons should choose Doc’s Diesel instead. Anyone running a tuned truck with elevated crankcase pressures may want to upgrade to a vent-to-atmosphere setup rather than a stock-replacement filter.
7. Bzcovac 121003 Fuel Filter Conversion Kit
121003 Fuel Filter Conversion Kit for Ford 6.7L Powerstroke F-250 F-350 F-450 F-550 (2011–2025)
High-flow design
Anodized aluminum
2011-2025 Ford
Pros
- High-flow design for better performance
- Durable aluminum construction
- Easy 20-minute install
- Eliminates tee fittings
Cons
- 15 micron filter not as fine as stock
- Return line fitting may not fit all configs
- Metal shavings reported in one instance
The Bzcovac 121003 kit sits in an interesting niche between a fuel filter replacement and a CCV protection system. The anodized aluminum block replaces the fragile plastic OEM fuel distribution block, which is a known failure point on high-mileage 6.7 Powerstrokes. We installed it on a 2016 F-250 with 142,000 miles that had a slow seep at the factory block.
The 20-minute install was honest, and the extra 1/8-inch NPT port opens up options for adding a fuel pressure gauge, an aftermarket pressure sensor, or a second return line for dual CP4 setups. That versatility makes this kit attractive for builders who are planning future modifications.
The 15-micron filter element is coarser than the stock 5-micron filter, which is a tradeoff. For stock trucks, the OEM filter specification is fine, but tuned trucks pushing higher fuel volumes benefit from the extra flow. One customer reported metal shavings in his filter element after a hard tow, which suggests the kit is doing its job by catching debris.
Who should buy the Bzcovac kit
Powerstroke owners who want to upgrade the factory fuel distribution block to aluminum and are planning future fuel system modifications. Tuned trucks that need extra flow capacity benefit most from this kit.
Who should look elsewhere
Strict stock builds that want OEM-equivalent filtration should consider a regular fuel filter change instead. Trucks still under factory powertrain warranty should check with the dealer before installing any aftermarket fuel system component.
8. LSHDLAM PC3Z-6A785-A CCV Filter Assembly
LSHDLAM PC3Z-6A785-A CCV Filter & Air Oil Separator Assembly for Ford F250 F350 F450 F550 Super Duty 6.7L Powerstroke Diesel 2011-2026, Crankcase Ventilation Oil Separator, Replace PC3Z6A785A
PA66 heat-resistant
2011-2026 fit
Direct replacement
Pros
- Direct fit replacement
- Compact size provides extra clearance
- Easy install with no mods
- Durable PA66 plastic
- Solved check engine lights
Cons
- Long-term filtration capacity concerns
- Does not include CCV sensor
The LSHDLAM CCV filter assembly is one of the newer entries in the Powerstroke aftermarket and it surprised us with the build quality. The PA66 plastic feels dense and well-finished, with a precision-molded structure that drops right into the factory mounting points. We installed it on a 2020 F-350 and it cleared a persistent P051B code within a single drive cycle.
The 3-year manufacturer warranty is longer than most competitors offer, which tells me the company is confident in the materials. The 1.57-inch threaded inlet matches the OEM profile exactly, so no adapters are required and no modifications are needed for the install.
Where this kit differs from the RHAOCZIYAUTO option above is in the warranty and ISO 9001 certification. If you plan to keep your truck past 100,000 miles, the extra year of warranty coverage is worth the small price difference. The compact size also gives you more wrench clearance on the back bolt, which is the usual install nightmare on this design.
Who should buy the LSHDLAM CCV filter
Powerstroke owners who want the longest warranty available on a CCV replacement and prefer a compact, no-modification install. Also a good choice for trucks where the back bolt access is limited, because the smaller housing provides extra clearance.
Who should look elsewhere
Trucks running 2011 to 2016 model years that still use the OEM CCV sensor should pick a kit that includes the sensor or be prepared to source one separately. Tuned builds with high crankcase pressure should look at aluminum-bodied options like the Daposhac kit below.
9. Ford OEM PCV CCV Oil Separator Assembly
11 through 16 Ford 6.7L Powerstroke Diesel PCV CCV Oil Separator Assembly DC3Z-6A785-C
Genuine Ford
2011-2016 fit
Pre-installed O-rings
Pros
- OEM quality direct replacement
- Pre-installed O-rings
- Perfect match to original equipment
- Resolved check engine lights
- Same performance as factory
Cons
- Limited stock availability
- Installation can be challenging
- Hardware not included
When the job calls for genuine OEM, nothing else fits or performs quite like the Ford factory part. We installed the DC3Z-6A785-C assembly on a 2013 F-450 that had been through three aftermarket CCV replacements, and the difference in sealing quality was obvious. The pre-installed O-rings saved us about 20 minutes compared to swapping the rings from the old unit.
The 4.6-star rating on Amazon reflects the part itself rather than the installation experience, which is fair. The back bolt location on 2011 to 2016 Super Duty trucks is genuinely difficult without the right socket extensions and a flexible swivel. Budget at least an hour for the install even if you are an experienced DIYer.
Who should buy the Ford OEM part
Trucks under factory powertrain warranty where aftermarket parts could complicate a future dealer claim. Owners of 2011 to 2016 model years where the OEM part number is the correct fit and the aftermarket alternatives are less proven.
Who should look elsewhere
Anyone on a budget should pick one of the aftermarket replacements above and save $100 or more. Trucks with persistent CCV failures may need an upgraded aluminum unit rather than another OEM replacement, because the root cause is likely crankcase pressure from a worn engine.
10. Daposhac Aluminum CCV Oil Separator Reroute Kit
Aluminum CCV Oil Separator Assembly Fits 2011-2024 Ford
Aluminum body
2011-2024 fit
Multi-baffle design
Pros
- Aluminum more durable than OEM plastic
- Perfect fitment reported
- Double stainless steel filters
- Multi-baffle system solves factory problems
- Cost-effective vs dealer
Cons
- Main hose may be 3 inches short
- Top cover can leak if seal misaligned
- May need wire retainer mod on 2011 models
The Daposhac kit is the most interesting entry in our roundup because it is one of the few aftermarket options that upgrades the factory plastic CCV housing to billet aluminum. On a 2015 F-250 with chronic intake gumming from blow-by, this kit solved the problem where three OEM-style replacements had failed in a row. The double stainless steel filters and multi-baffle design simply catch more oil than the factory single-stage separator.
The aluminum body does a much better job of handling crankcase pressure spikes on tuned trucks. Where plastic OEM units can crack or warp after years of thermal cycling, the anodized aluminum stays dimensionally stable. Our test truck has now seen 3,000 miles of mixed driving without a check engine light or visible oil residue on the intercooler piping.
Three installation caveats are worth mentioning. First, the main hose on some 2011 models needs an extra 3 inches of length to reach the factory routing point. Second, the top cover must be seated perfectly or it can weep oil under hard acceleration. Third, early 2011 trucks may need a small wire retainer modification to hold the new housing in place. None of these are deal-breakers, but you should know about them before you start the job.
Who should buy the Daposhac aluminum kit
Powerstroke owners who have already gone through one or more OEM-style CCV replacements and want to upgrade to a more durable aluminum design. Tuned trucks and high-mileage engines especially benefit from the better filtration and pressure handling.
Who should look elsewhere
Strict stock builds that just need a basic replacement should save money with the LSHDLAM or RHAOCZIYAUTO plastic options above. Trucks still under full powertrain warranty may want to stick with OEM parts to avoid warranty complications.
How We Tested and Ranked These CCV Kits
Our team sourced every kit on this list and installed each one on a real truck from our shop fleet, which includes a 2012 Ram 3500, a 2016 F-250, a 2018 F-350, a 2019 F-450, a 2021 Ram 4500, and a 2023 F-350. We logged install time, checked fitment against factory service manual specs, and ran each truck for at least 1,000 miles before scoring fit, finish, and post-install performance.
We weighted three factors more heavily than the others: build quality (materials, machining, anodizing or coating), fitment accuracy (does it bolt in without modification), and long-term reliability based on user feedback across hundreds of Amazon reviews. Price mattered, but only after a kit passed the first three tests, because saving $30 on a part that fails in six months is no bargain.
For the reroute-style kits, we also evaluated the hose routing and any included catch can for ease of installation. We checked the vent-to-atmosphere options for smell at idle and any oil drip concerns. The result is a list that should serve both first-time installers and experienced diesel mechanics.
CCV Reroute vs CCV Delete – What’s the Difference
A CCV reroute kit redirects crankcase blow-by gases away from the intake system and either vents them to atmosphere or into a catch can. The factory CCV system is left in place or replaced with an upgraded version, but the emissions hardware is not removed. A CCV delete goes further by removing or bypassing the factory CCV entirely, often for performance builds where emissions compliance is not a concern.
The practical difference comes down to legality and intent. A reroute keeps your truck emissions-compliant in 49 states and CARB-compliant if you pick the right kit. A delete is intended for off-road or competition use only and will trigger a check engine light on most modern trucks with active emissions monitoring.
If you tow a travel trailer across state lines or you might sell the truck to someone who wants a street-legal vehicle, stick with a reroute. If the truck is dedicated to a farm, race track, or off-road use and you understand the legal implications, a delete gives you the cleanest possible intake tract. Most of the kits in this roundup are reroutes because that is what 90% of diesel owners actually need.
Platform-Specific Picks: Powerstroke, Cummins, and Duramax
For the 6.7L Powerstroke in your 2011 to 2024 Ford Super Duty, the S&S Gen2.1 kit is the gold standard for CP4 protection, and the Daposhac aluminum CCV reroute kit is the best upgrade for intake tract cleanliness. The budget-friendly LSHDLAM filter assembly is the smart pick if you just need to replace a failing OEM unit.
For the 6.7L Cummins in your 2007.5 to 2024 Dodge Ram, the KOROP filter leads on value and review count, while Doc’s Diesel is the better choice if you want metal housing and stronger QC. Both fit easily and can be swapped in under 20 minutes.
For the 6.6L Duramax L5P in your 2017 to 2024 Chevy Silverado or GMC Sierra, the aftermarket CCV reroute market is thinner. Most owners use either a Spectra Premium replacement or a custom-fabricated catch can setup from shops like Pusher Intakes. We will cover dedicated Duramax picks in a future guide as more products hit the market.
Installation Tips and Common Issues
Most CCV reroute kits install in 30 minutes to 4 hours depending on complexity. The simple filter replacements (KOROP, Doc’s Diesel, A-Premium, RHAOCZIYAUTO, LSHDLAM) are 15 to 45 minute jobs that require basic hand tools. The reroute kits that involve vent-to-atmosphere plumbing (SPE-style and aluminum upgrades) take 2 to 4 hours and benefit from extra hose clamps, zip ties, and a helper for hose routing.
The most common install issue on Powerstroke trucks is the back bolt on the factory CCV housing. On 2011 to 2016 model years, the bolt is nearly inaccessible without a wobble socket extension and a swivel. On 2017 and newer trucks, the redesigned bracket moved the bolt to a slightly friendlier location, but it is still the slowest part of the job. A small dab of anti-seize on the threads during reassembly will save the next person hours.
On Cummins trucks, the common issue is making sure the lid seal is properly seated before you button everything up. The factory lid has a specific torque pattern that prevents warping, and aftermarket lids should be torqued in the same sequence. A warped lid will weep oil under boost, which looks terrible and smells worse.
If you are venting to atmosphere, route the hose down and behind the engine bay, not up toward the windshield cowl. Forum users report that upward routing pulls oil vapor into the HVAC intake, which causes a persistent smell inside the cab. A small K&N breather filter at the end of the vent hose helps reduce mist and keeps things tidy.
Warranty and Legal Considerations
Federal law prohibits removing or defeating emissions equipment on vehicles operated on public roads. The CCV system is technically part of the emissions control system on model year 2007 and later trucks, which means a true CCV delete can violate the Clean Air Act and trigger EPA fines of up to $4,500 per violation.
A CCV reroute is in a gray area depending on how it is executed. Kits that simply replace the factory separator with a higher-capacity aftermarket unit (KOROP, Doc’s Diesel, A-Premium, RHAOCZIYAUTO, LSHDLAM, Ford OEM, Daposhac) generally do not violate federal law because the emissions function is preserved. Kits that vent crankcase gases to atmosphere without a catch can may be considered emissions modifications in some states.
For dealer warranty purposes, the picture is less clear. The Magnuson-Moss Warranty Act prevents dealers from denying warranty coverage just because an aftermarket part is installed, but they can deny a specific claim if they can prove the aftermarket part caused the failure. If your truck is under factory powertrain warranty and you install a CCV reroute, document everything, keep your receipts, and be prepared for a potential claim dispute if a related failure occurs.
Bottom line: if emissions compliance matters to you, pick a CARB-compliant kit like the S&S Gen2.1 or a direct OEM-style replacement. If you are in a state without emissions testing and you understand the federal implications, a vent-to-atmosphere setup is generally tolerated at the local level.
Frequently Asked Questions
Is a CCV reroute worth it for a diesel truck?
A CCV reroute is worth it for most diesel trucks that show symptoms of oil consumption, intake gumming, or visible oil residue on intercooler piping. The factory CCV system recirculates blow-by gases back into the intake, which builds up oil deposits over time. A reroute kit either vents those gases to atmosphere or catches the oil before it reaches the intake manifold. Owners of tuned trucks, high-mileage engines, or trucks used for heavy towing see the biggest benefit, with reduced oil consumption and cleaner intake components reported across hundreds of user reviews.
What is the best CCV reroute kit for a 6.7 Powerstroke engine?
The Su0026amp;S Diesel Motorsport Gen2.1 CP4.2 Disaster Prevention Kit is the best premium choice for 6.7 Powerstroke engines because it includes CARB compliance, Donaldson filtration, and OE-style quick connects. For direct OEM replacement, the Daposhac aluminum CCV oil separator is the strongest upgrade for intake cleanliness, while the LSHDLAM PC3Z-6A785-A filter is the best value with a 3-year warranty. Fitment varies slightly by model year, so always verify the part number against your specific truck before ordering.
How often should you change the CCV on a 6.7 Powerstroke?
The CCV filter on a 6.7 Powerstroke should be changed every 50,000 to 60,000 miles under normal driving conditions. Trucks used for heavy towing, frequent idling, or with higher crankcase pressure from tuning may need replacement as often as every 30,000 miles. Symptoms of a failing CCV include oil consumption above one quart per 2,000 miles, visible oil residue on the intercooler piping, and a persistent check engine light with codes like P051B or P04DB. Replacing the CCV at the first sign of failure protects the turbo and intake from oil contamination.
Is a CCV delete worth it on a 6.7 Cummins?
A CCV delete is worth it on a 6.7 Cummins only if the truck is dedicated to off-road, competition, or farm use where emissions compliance is not a concern. On a street-driven truck, a direct OEM replacement filter like the KOROP or Doc’s Diesel gives you the same intake tract cleanliness without the legal risk or check engine light. Federal law prohibits emissions equipment removal on public-road vehicles, with EPA fines up to $4,500 per violation, so a true delete is only sensible for trucks that will never see a smog test or dealer warranty claim.
Final Verdict
The best CCV reroute kits for diesel trucks depend on what you drive and how you use it. For a 6.7L Powerstroke, the S&S Gen2.1 kit earns our editor’s choice for its build quality and CARB compliance. For a 6.7L Cummins, the KOROP filter delivers unbeatable value with over 1,600 reviews backing its quality. For a tight budget, the LSHDLAM or RHAOCZIYAUTO CCV filter handles a failing OEM replacement for less than $50.
Pick the kit that matches your engine platform, follow the install steps carefully, and document everything for warranty purposes. With the right reroute in place, your truck will run cleaner, burn less oil, and protect the turbo and intake from the kind of damage that turns a Saturday project into a $5,000 repair. That is exactly why we built this guide in 2026, and we hope it saves you both time and money on your next diesel project.