Fitment wasn’t the greatest could improve a lot
6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2026
L5P Up Pipe | 6.6L Duramax | GMC/Chevy 2017-2024
Regular price
$499.99
Regular price
Sale price
$499.99
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GM Duramax L5P (2017-2024)
L5P Up Pipe | 6.6L Duramax | GMC/Chevy 2017-2024
L5P Up Pipe | 6.6L Duramax | GMC/Chevy 2017-2024
SKU: SKU:EP-GM-L5P-UP
Regular price
$499.99
Regular price
Sale price
$499.99
Quantity
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Overview
The L5P high-flow up-pipes are a direct replacement for the restrictive factory units, designed to increase exhaust flow and reduce back pressure on 2017-2024 6.6L Duramax engines. Built from heavy-gauge stainless steel with a larger internal diameter, they support improved exhaust velocity and lower EGTs while retaining emissions-compliant operation.
Compatibility
- Years: 2017-2024
- Makes: Chevrolet, GMC
- Models: Silverado 2500HD / 3500HD, Sierra 2500HD / 3500HD
- Engine: 6.6L Duramax L5P Diesel
Technical Specifications
| Specification | Detail |
|---|---|
| Material | 11-gauge 304 stainless steel |
| Flow Increase | 46% larger flow area vs OEM |
| Bellows Type | Internally-sleeved 304 stainless steel |
| Gaskets Included | 301 stainless steel gaskets |
| Fitment Type | OEM-length direct replacement |
Key Features & Build Details
- 46% Increased Flow Area - Larger internal diameter reduces restriction compared to factory up-pipes, improving exhaust gas movement.
- 11-Gauge 304 Stainless Construction - Thick-wall stainless steel resists cracking, corrosion and heat fatigue under sustained load.
- Internally-Sleeved Bellows - Reinforced bellows design adds durability by preventing over-expansion and premature failure common in OEM designs.
- OEM-Length Design - Maintains factory routing and fitment for a true bolt-on installation without modification.
- Stainless Steel Gaskets Included - 301 stainless gaskets provide reliable sealing under high heat and pressure conditions.
Performance Benefits
- Reduces Exhaust Backpressure - Increased flow area allows exhaust gases to exit more efficiently, improving overall engine breathing.
- Helps Lower EGTs - Improved exhaust flow reduces heat buildup under load, beneficial for towing and tuned applications.
- Improves Turbo Efficiency - Smoother exhaust delivery to the turbo supports more consistent spool and response.
- Maintains Emissions Compliance - Designed to work with factory emissions systems without triggering issues.
- Increases System Durability - Heavy-duty materials and reinforced bellows reduce the risk of failure over time.
Installation Notes
Direct bolt-on replacement using factory mounting points. Installation requires removal of factory up-pipes and access to the turbo area; professional installation recommended due to tight engine bay clearances.
Frequently Asked Questions
Do these up-pipes fit stock L5P turbo setups?
Yes. These are OEM-length replacements designed to fit factory turbo and exhaust manifold connections.
Will these up-pipes trigger any check engine lights?
No. They are designed to maintain compatibility with factory emissions systems and sensors.
How do these compare to factory up-pipes?
They offer a 46% increase in flow area along with stronger materials and reinforced bellows, addressing common OEM restriction and durability issues.
Are gaskets included with the kit?
Yes. The kit includes 301 stainless steel gaskets for proper sealing during installation.
Are these suitable for tuned or high-load applications?
Yes. The increased flow and heat-resistant construction are designed to handle higher exhaust temperatures and pressures.
2017-2024 Chevy Duramax L5P 6.6L Silverado 2500 / 35002017-2024 GMC Duramax L5P 6.6L Sierra 2500 / 3500
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.
Warranty
Hardware components are covered by Tuner Depot's standard warranty. Tuning devices and software carry manufacturer warranty terms. Use of these products will void your vehicle's factory warranty. Please confirm with your manufacturer before installation.
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 169 reviews.
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.
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
Nice mellow tone and quiet, no diesel is quiet but this muffler makes trips comfortable with no throwing noise at highway speeds.
Glad there are still parts company around
L5P Downpipe 3.5 Inch Turbo Direct Pipe | 2017-2026 GMC Chevrolet
Timely shipping Not yet installed
When buying the delete kit make sure you buy this if your doing a FULL delete. Once installed the truck sounded amazing with the 5 inch exhaust.
L5P Downpipe 3.5 Inch Turbo Direct Pipe | 2017-2026 GMC Chevrolet
Easier install then I expected solid switch cant complain
Really Love The Quality of the Exhaust look Great
L5P 5-Inch Stainless Steel Downpipe-Back Exhaust System | 2017–2025 Duramax 6.6L
Already put On All good Works Great
I Will Be Putting it all together this weekend But Love It
Great
Fit great just a job to install
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