It’s more responsive in the pedal.
6.6L Duramax L5P CCV Upgrade Kit | GM 2017-2026
Regular price
$349.99
Regular price
Sale price
$349.99
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GM Duramax L5P, 6.6L (2017-2026)
6.6L Duramax L5P CCV Upgrade Kit | GM 2017-2026
6.6L Duramax L5P CCV Upgrade Kit | GM 2017-2026
SKU: SKU:ACC-CCV-GM-L5P
Regular price
$349.99
Regular price
Sale price
$349.99
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Overview
The L5P CCV upgrade kit is a direct replacement for the factory crankcase ventilation system, designed to eliminate restriction, prevent pressure buildup, and improve long-term reliability on 2017-2026 6.6L Duramax engines. By replacing the OEM plastic housing with a billet assembly, it resolves common issues like clogging and oil leaks associated with the stock CCV system.
Compatibility
- Years: 2017-2026
- Makes: Chevrolet, GMC
- Models: Silverado 2500HD / 3500HD, Sierra 2500HD / 3500HD
- Engine: 6.6L Duramax L5P Diesel
Technical Specifications
| Specification | Detail |
|---|---|
| Material | CNC-machined billet aluminum |
| Sealing | Integrated O-ring seals |
| System Type | Closed Crankcase Ventilation (CCV) Upgrade |
| Installation Time | Approximately 1 hour |
| Fitment Type | Direct replacement - no modifications required |
What's In the Kit & How It's Built
- Billet Aluminum CCV Housing - CNC-machined from solid billet aluminum to replace the weak OEM plastic unit. No more cracking, warping or heat-related failure. Built to last the life of the truck.
- Optimized Internal Flow Path - The internal design moves more air with less restriction than the factory crankcase filter setup. Better flow means less pressure buildup and a healthier engine long-term.
- Precision O-Ring Sealing - Tight O-ring seals at every mating surface keep oil vapor where it belongs — inside the system. No seeping, no mess.
- Everything You Need Included - This is a complete CCV kit. All components needed for a full CCV system replacement are in the box. No separate trips to the parts store.
- Bolt-On Fitment - Machined to match factory mounting points exactly. Drop it in, torque it down, and you're done. No cutting, drilling, or fabrication needed.
Why Upgrade Your L5P CCV System?
- Fix Crankcase Pressure Problems for Good - The stock CCV system is known to clog and restrict over time. This kit restores proper ventilation and keeps crankcase pressure in check, reducing wear on engine seals and gaskets.
- Stop Oil Leaks Before They Start - Excess crankcase pressure is one of the leading causes of rear main seal and oil pan gasket leaks on the L5P. Upgrading the CCV is one of the best preventive steps you can take.
- Ditch the Failure-Prone L5P OEM Plastic - GM's factory housing is plastic. It clogs, it cracks, and it fails. This billet replacement eliminates those weak points entirely.
- Built for the Long Haul - Whether you're towing heavy every week or putting serious miles on your Duramax, this kit is engineered to hold up under sustained heat, oil exposure, and load without degrading.
- Cleaner, More Professional Engine Bay - The billet aluminum finish looks sharp under the hood and is easy to inspect and service down the road.
Installation
This is a direct bolt-on replacement that any experienced DIYer or shop mechanic can handle with basic hand tools. Most installs take about an hour, including removal of the factory CCV assembly. No tuning required after install — the upgraded system runs entirely within factory parameters.
Frequently Asked Questions
Does this fully replace the factory CCV system on the L5P Duramax?
Yes. This kit replaces the entire OEM crankcase ventilation housing and internal filter assembly. Once installed, the factory unit is out for good.
My L5P has a clogged CCV filter will this fix it?
Yes, that's exactly what this kit is designed for. It clears the restriction caused by a clogged CCV filter and upgrades the system so clogging isn't an issue going forward.
Is this the same as an L5P intake horn PCV delete or reroute?
No. This is a closed-system CCV upgrade — it improves ventilation flow while keeping proper routing intact. If you're also looking to upgrade intake airflow, the L5P turbo intake horn is a separate bolt-on available here: L5P Turbo Intake Horn.
Do I need a tune after installing this CCV upgrade?
No. This is a direct replacement that operates within factory parameters. No ECM tuning needed.
Will this work with other L5P upgrades I already have installed?
Yes. This kit is designed to be compatible with common L5P Duramax performance and maintenance upgrades without any fitment conflicts.
2017-2026 Chevy Duramax L5P 6.6L Silverado 2500HD / 3500HD2017-2024 GMC Duramax L5P 6.6L Sierra 2500HD / 3500HD
Shipping Policy at Tuner Depot
At Tuner Depot, we understand the importance of timely delivery for your performance parts. We're committed to ensuring a seamless shipping experience, striving to dispatch your orders with utmost efficiency and speed.
Our Shipping Policy: Our aim is to dispatch all orders within two business days, providing you with a quick and efficient processing time. However, unforeseen circumstances beyond our control may occasionally impact shipping times.
Factors Affecting Shipping:
- Weather Conditions: Adverse weather conditions such as rain, snow, or sleet may affect delivery timelines. We will make every effort to minimize any delays.
- Holiday Periods: Please note that our shipping center will be closed during holidays. We will resume shipping promptly on the next business day. Allow for potential delays during peak seasons, but rest assured, we will keep you informed every step of the way.
- Staff Availability: Unforeseen circumstances can occasionally affect our staffing levels, possibly leading to minor delays. We are committed to swiftly resolving any issues to maintain our high standards of service.
We genuinely appreciate your understanding and patience during any unexpected obstacles. Be assured that we will utilize every resource available to deliver your performance parts promptly.
Items Eligible for Return
These items can be returned within 30 days of the purchase date, provided they are unopened, unused, and in their original packaging:
- Tuning devices – for example, an unopened/unused Mini Maxx V1/V2 or blank EFI Live Device
- Cables and device accessories – for example, an unopened/unused switch, bypass cable, universal pyrometer & docking station
Final Sale / Non-Refundable Items
The following items are final sale and cannot be returned:
- Custom tuning – including additional tune files purchased separately or custom tuning purchased with a device
- Exhausts and race pipes – this also includes downpipes purchased separately from an exhaust or race pipe
- EGR kits
Manufacturer Warranty
All items we sell include a 90-day manufacturer warranty.
If an item is being returned due to a manufacturer defect, it may be returned for a full refund, exchange, or replacement with a similar item of equal or lesser value.
For eligible items being returned for any other reason, the same options apply: full refund, exchange, or replacement with a similar item of equal or lesser value, provided the item meets the return requirements above.
Return Process
All returns must be approved by our team before being sent back. We will provide a valid RMA number and prepaid return label for the return.
Please do not send any items back without an approved RMA and the return label provided by us, as returns sent without these will not be accepted or processed.
Off-Road Use Only
These products are intended for off-road, race, and competition use only and may not be legal for use on public highways where emissions laws apply. Check your local and state regulations before purchase.
Customer Reviews
Overall rating: 4.6 / 5 from 179 reviews.
Fitment wasn’t the greatest could improve a lot
6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2026
Tuner depot was very helpful I thought I screwed up on the tune part and flashing the ecm but there customer service told me I didn’t mess it up and helped me through it but one thing for sure is nothing to do with tuner depot but no one every tells you on a first time doing one of these trucks the amount of hours it takes it took me almost 30 hours which if I had the right tools and confidence I could of probably cut it down to about 20 but kit works great it’s got awesome power now and I’ll be doing the down pipe very soon to I highly recommend just buying it and getting it over with because the truck is still very quiet almost like it’s a notch above stock
GM Duramax L5P All-In-One DPF/DEF/EGR Delete Kit (2017-2025)
Just got them installed on my truck yesterday and cannot believe the increase in performance! Can’t wait to take it on a road trip already see more power increase and fuel mileage. Unbelievable would do it again tomorrow!
Love the sound of the straight exhaust especially on the Dirtymax they just sound badass without a muffler
I purchased the efi live sotf tunes along with Dpf delete kit, dpf was good quality, tuner worked with me and not only sent my autocal loaded with a sotf tune but also sent me a few single tunes to use until I installed the switch, the only negative was that 130hp was the max power tune single or switch on the fly, but over all I was pretty happy and service was very good throughout.
The ordering process was easy, the parts came fast and the response from the team has been incredible!
6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2026
Love it
still waiting
nice sound without drawing unwanted attention
6 weeks was to long without updates
6.6L Duramax L5P Cold Air Intake | 2017-2026 Sierra/ Silverado
Very easy to work with! Everything fit as it should
6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2026
Pretty easy to install, works great
Works s expected
Great product
Timely delivery, great product NOT cheap junk.
L5P Downpipe 3.5 Inch Turbo Direct Pipe | 2017-2026 GMC Chevrolet
Thank you!
Great communication
Sounds great easy installation
6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2026
Did not fix on the fling correctly where the downpipe sits and was pushing upwards towards frame
6.6L Duramax L5P CAT & DPF Delete Pipe | 2017–2026 GMC/Chevy
Pretty straight forward install
6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2026
Helped quiet down the straight 4" pipe
Should come with clamps
Everything went smooth and lined up great just wish it would’ve came with instructions
6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2026
Customer service absolutely sucks!!!!
Great product
L5P Downpipe 3.5 Inch Turbo Direct Pipe | 2017-2026 GMC Chevrolet
Worked and fit as expected
Perfect sound
Could have come with some kind of directions. Made it through it ok but a little direction would have been nice. Overall everything works as it should.
Sounds great not to loud
Before installing never had a code after install getting low fuel rail pressure code under load. If I keep RPMs up just a little ( by switching to manual shift and never come out of 5 gear Allison 6 speed trans) will work fine . If u shift to 6th gear lower RPM as soon as u go up a little incline it starves for fuel and goes into reduced power mode. But if u mash the excelsior and down shifts it will take off like a rocket.
Worked perfectly.
6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2025
Sounds good.
I received a product that was very different from what I ordered, and I have tried to contact you but haven't received a response.
6.6L Duramax L5P Cold Air Intake | 2017-2026 Sierra/ Silverado
Truck has a nice rumble but not excessively load like a straight pipe.
Muffler has great sound, no restrictions. The best part of the whole deal was the outstanding service and shipping that Tuner Depot provided. Would definitely use them again.
Fit was very good and looks great on my vehicle.
6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2025
Sound is exactly what I was looking for.
Was a little nervous if it was going to show up, nice quality and ease of install would purchase again
GM Duramax 6.6L - Shibby Engineering Tuner Harness Plug Kit (2011-2023)
Excellent
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