GM Duramax L5P - EGR & Cooler Delete Kit (2017-2025)
Type: EGR Delete Kit
Eliminate heat, soot, and failure points
This EGR & Cooler Delete Kit is engineered for 2017–2025 Duramax L5P 6.6L trucks to remove the factory EGR system, reducing exhaust gas temperatures and improving engine efficiency. Designed for off-road and competition use only, custom tuning is required for proper operation.
This complete delete solution removes the EGR valve, EGR cooler, and all associated emissions components from the L5P platform. It’s built to reduce backpressure, clean up airflow, and help the engine run cooler under sustained load. CNC-fit block-off plates, formed coolant lines, and full gaskets/hardware make installation clean and effective.
Vehicle Fitment
Compatible Vehicles
- 2017–2025 GMC Sierra 2500 / 3500 / 4500 / 5500 with 6.6L L5P Duramax
- 2017–2025 Chevrolet Silverado 2500 / 3500 / 4500 / 5500 with 6.6L L5P Duramax
Note: Direct integration with the L5P platform. Verify body style and accessory clearance before install.
Technical Specifications
| Component | Description |
|---|---|
| Block-off Plates | CNC-machined aluminum and coated steel |
| Coolant Hoses | Pre-assembled formed hoses with fittings |
| Included Hardware | Grade 8.8 bolts, clamps, vacuum cap, plugs |
| Gaskets | 3× exhaust, 3× turbo |
| Installation Time | 4–8 hours depending on tools and experience |
What’s Included
- 3 × Coolant hoses with pre-installed fittings
- 1 × Aluminum block-off plate
- 2 × Steel block-off plates
- 4 × Grade 8.8 bolts
- 1 × Vacuum cap
- 2 × Hose clamps
- 3 × Exhaust gaskets
- 3 × Turbo gaskets
- 1 × Aluminum 9th-injector block-off plug
- 1 × Aluminum coolant-hose block-off plug
Key Features
- Full removal of the EGR valve and cooler for the L5P
- Precision CNC-fit block-off plates ensure leak-free sealing
- Formed coolant lines for a clean engine bay and faster install
- Reduces backpressure and lowers exhaust gas temperatures
- Designed for competition and off-road use only
- Custom tuning is mandatory for operation
Benefits
- Improved Power & Response: Quicker turbo spool and stronger mid-range acceleration
- Better Towing Performance: Lower EGTs under sustained load reduce heat stress
- Fuel Efficiency: Potential MPG gains with optimized tuning
- System Reliability: Fewer clogs, fewer leaks, fewer check engine lights
- Engine Longevity: Less soot and thermal strain across engine components
Installation
- Tune the vehicle first, confirm connectivity, and clear any DTCs
- Then proceed with physical installation
- Installation difficulty: moderate – requires hand tools and coolant service
- Confirm proper gasket seating and fastener torque
- Bleed the cooling system and re-check fittings after first heat cycle
Frequently Asked Questions
Q: Do I need custom tuning?
Yes. Tuning is required to disable EGR functions and prevent codes.
Q: Will this fit my 2020 Sierra 3500?
Yes. The kit is compatible with all 2017–2025 L5P models including 2500/3500/4500/5500. Ensure there is space for coolant reroute and block-off clearance.
Q: What performance gains can I expect?
Expect quicker spool, lower EGTs, and smoother mid-range torque when paired with tuning.
Q: Can I install this at home?
Yes, if you’re experienced with diesel systems and coolant service. Otherwise, professional installation is recommended.
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.
