GM Duramax 6.6L L5P - Stainless Up-Pipes (2017-2024)
Type: Up-Pipes | Fits: GM Duramax
Increase flow. Reduce heat. Eliminate factory weak points. These 2β stainless steel up-pipes are engineered for 2017β2024 6.6L Duramax L5P trucks, replacing the restrictive factory 1-5/8β piping. Built for improved exhaust flow and long-term durability, this upgrade supports faster turbo response and lower exhaust gas temperatures in performance and off-road applications.
For off-road/competition use only. Requires EGR delete configuration.
Factory L5P up-pipes are smaller in diameter and can develop leaks at the bellows over time. Upgrading to larger 2β stainless steel piping increases exhaust volume to the turbo while removing common leak points. Precision TIG welding and properly machined flanges ensure a secure fit and dependable sealing under elevated boost and heat.
Vehicle Fitment
- 2017β2024 GMC Sierra 2500HD / 3500HD β 6.6L Duramax L5P
- 2017β2024 Chevrolet Silverado 2500HD / 3500HD β 6.6L Duramax L5P
Technical Specifications
| Product Type | Exhaust Up-Pipes (Pair) |
| Tubing Diameter | 2β Stainless Steel (Replaces OEM 1-5/8β) |
| Flanges | Mild Steel, Precision-Machined |
| Construction | TIG-Welded for Strength and Durability |
| EGR Provision | None β Designed for EGR Delete Setups |
| Installation | Direct-Fit with Included Gaskets & Hardware |
| Use | Off-Road / Competition Only |
Whatβs Included
- Pair of 2β stainless steel up-pipes
- Premium exhaust gaskets
- Required mounting hardware
- Installation guidance (if applicable)
Features
- Larger 2β tubing increases exhaust flow compared to factory pipes
- Eliminates common OEM bellow leak points
- Precision TIG-welded construction for long-term durability
- Mild steel flanges engineered for a secure, leak-resistant seal
- Designed specifically for 2017β2024 L5P applications
Benefits
- Faster turbo spool-up and improved throttle response
- Lower exhaust gas temperatures under load
- Reduced exhaust restriction for improved performance potential
- Improved reliability over factory up-pipe design
- Supports tuned and performance-focused builds
Installation Notes
- Designed for use with EGR delete configurations.
- Professional installation recommended due to access requirements.
- Verify compatibility with your specific exhaust and tuning setup before installation.
Important Notes:
Hurry Up! Only 5 items left in stock!
Copy link:
Share:
TARIFF NOTICE:
While we ship with all required USMCA/CUSMA paperwork, U.S. Customs or carriers may still apply duties or fees at delivery. For details, see U.S. Customs & Border Protection
Shipping
We strive to provide fast and reliable shipping options for all our customers. For detailed information about our shipping rates, delivery times, and policies, please visit our Shipping Page.
Return Policies
Your satisfaction is important to us. If you wish to return an item or request a refund, please review the terms and conditions outlined in our Returns Policy.
Important Notices
- OffβRoad Use Only
Products sold by JS Speed are intended for offβroad use and may be illegal on public roads where emissions or pollutionβcontrol laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicleβs factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
