GM Duramax L5P Cat & DPF Delete Pipe (2017-2025)
Type: exhaust-component
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 2017–2025 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: 2017–2025 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax (OEM 4-bolt flange)
- Compatible: 2017–2025 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 | High-grade stainless steel |
| 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)
Key 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 – Built from high-grade stainless steel to resist corrosion and heat fatigue.
- 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
Is this delete pipe street-legal?
No. This product is for off-road and race use only. It is not legal for use on public highways or emissions-controlled vehicles.
Do I need custom tuning?
Yes. You must use compatible race tuning or custom software to disable related DPF and catalyst functions.
Will this fit my 2024 or 2025 Duramax?
Yes. It fits all 2017–2025 Chevrolet Silverado and GMC Sierra 2500HD / 3500HD models equipped with the OEM 4-bolt flange turbo connection.
Can I install this with hand tools?
Yes. The system is a direct bolt-on replacement using factory hanger points. No cutting or welding required.
What material is best—stainless or aluminized?
This model uses high-grade stainless steel for superior corrosion resistance and heat durability, ideal for long-term performance builds.
Important Notes:
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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.
