FITMENT
- 2017-2023 6.6L Silverado & Sierra Duramax L5P 2500HD 3500HD Diesel engine trucks.
- Note: Will NOT fit Cab & Chassis commercial-style trucks.
DESCRIPTION
Product Overview
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Restrictive exhaust geometry and continuous exhaust gas recirculation restrict the power output and long-term breathability of L5P Duramax trucks. The pinched OEM downpipe chokes exhaust flow immediately after the turbocharger exit, while the factory EGR system feeds abrasive soot straight back into the intake tract—leading to sticky carbon deposits that restrict engine airflow.
- Eliminate primary breathing restrictions with this complete L5P Turbo Downpipe & EGR Delete Package. By replacing the bottlenecked downpipe and bypassing the exhaust recirculation system, it restores rapid throttle response, protects your intake manifold from soot buildup, and ensures your engine operates on cool, clean, unrestricted air.
Key Features
- Keeps exhaust gases moving fast through smooth 4" mandrel-bent tubing, which pays off in quicker turbocharger spool-up and a snappier throttle.
- Strips backpressure straight off the turbine housing with mandrel-bent high-flow piping, letting the L5P VGT turbo come on boost faster for sharper response.
- Wipes out intake carbon sludge and coolant leaks by deleting the factory EGR cooler entirely, keeping abrasive soot off the intake valves and ending internal coolant loss.
- Brings down EGTs and cancels DPF regenerations by removing the restrictive exhaust canisters and downpipe crimps, shutting off fuel-wasting active regens.
FAQ
Q: How does a race pipe differ from a complete exhaust system?
A: A race pipe swaps the restrictive factory emissions section for a high-flow pipe. A complete exhaust system replaces more of the factory exhaust path for customers who want a full exhaust upgrade.
Q: In what way does the EGR delete safeguard the engine?
A: Removing the factory EGR cooler stops hot exhaust soot from entering the intake system, reducing carbon buildup and helping keep cleaner airflow through the engine.
Q: What’s the point of upgrading the turbo downpipe on the L5P Duramax?
A: The factory downpipe features restrictive bends near the turbo outlet. The 3.5" mandrel-bent downpipe gives exhaust gases a smoother transition, improving turbo efficiency and throttle response.
Q: Can this kit bring EGTs down?
A: Yes. The upgraded downpipe and race pipe cut exhaust restriction, which supports lower exhaust temperatures during heavy loads. That added flow is especially valuable when towing or running an aggressive tune.
