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Description
L5P Up Pipe | 6.6L Duramax | GMC/Chevy 2017-2024Overview 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 20172024 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
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
Q: Do these up-pipes fit stock L5P turbo setups?
A: Yes. These are OEM-length replacements designed to fit factory turbo and exhaust manifold connections.
Q: Will these up-pipes trigger any check engine lights?
A: No. They are designed to maintain compatibility with factory emissions systems and sensors.
Q: How do these compare to factory up-pipes?
A: They offer a 46% increase in flow area along with stronger materials and reinforced bellows, addressing common OEM restriction and durability issues.
Q: Are gaskets included with the kit?
A: Yes. The kit includes 301 stainless steel gaskets for proper sealing during installation.
Q: Are these suitable for tuned or high-load applications?
A: Yes. The increased flow and heat-resistant construction are designed to handle higher exhaust temperatures and pressures.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy