6.6L Duramax L5P CAT & DPF Delete Pipe | Chevy & GMC | 2017–2026
Type: exhaust-component
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Unlock airflow and performance in your 6.6L Duramax. This 4-inch stainless steel delete pipe replaces the factory catalytic converter and diesel particulate filter (DPF). Designed strictly for off-road and competition use, it reduces exhaust restriction, lowers EGTs, and supports custom performance tuning.
The GM Duramax L5P Cat & DPF Delete Pipe is precision-engineered for 2017–2026 Chevrolet and GMC 2500/3500HD trucks equipped with the 6.6L Duramax. Featuring a high-flow straight-pipe design and OE-style hangers, this exhaust upgrade delivers unrestricted flow and easy bolt-on installation, no cutting or welding required.
Vehicle Fitment
- Compatible: 2017–2026 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax (OEM 4-bolt flange)
- Compatible: 2017–2026 GMC Sierra 2500HD / 3500HD 6.6L Duramax (OEM 4-bolt flange)
- Not Compatible With:
- 3500 / 4500 / 5500 Cab & Chassis models
- Any model without OEM turbo direct pipe
Specifications
| Pipe Diameter | 4 inches |
|---|---|
| Material | 304 or 409 stainless steel, according to the selected variant |
| Design | Straight-pipe with OE-style hangers |
| Tuning Requirement | Yes – Race tuning software required |
What’s Included
- 4" stainless steel delete pipe
- OE-style hangers
- 4-bolt flange
- Installation hardware (if applicable)
Features
- Full Flow Design – Replaces restrictive factory catalytic converter and DPF assemblies.
- Performance Focused – Improves exhaust flow, throttle response, and overall power output.
- Durable Stainless Construction – Choose the 304 or 409 stainless steel variant for your application.
- OE-Style Fitment – Hangers and flange match factory geometry for easy bolt-on installation.
- Tuner Ready – Designed for trucks running race tuning or off-road calibrations.
Benefits
- Improves power and torque by removing flow restrictions
- Reduces EGTs under heavy towing and load conditions
- Enhances throttle response and turbo spool
- Built to withstand demanding off-road and performance use
Frequently asked questions
Will this pipe fit a Cab & Chassis truck?
No. It is intended for Silverado and Sierra 2500HD/3500HD pickups, not Cab & Chassis exhaust layouts.
Does this listing include a full downpipe-back exhaust?
No. It replaces the catalytic converter and DPF section. Other exhaust components are separate.
Important Notes:
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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
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Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control 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 vehicle’s 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.
6.6L Duramax L5P CAT & DPF Delete Pipe | Chevy & GMC | 2017–2026
Vehicle Fitment
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