FITMENT
- 2020-2023 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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The factory emissions and exhaust systems on L5P engines present major restrictions to turbo spool and long-term reliability. The crushed factory turbo downpipe and heavy DPF canister trap extreme exhaust heat under hood, creating intense backpressure and triggering fuel-draining active regenerations.
- Meanwhile, the factory EGR cooler feeds hot, abrasive exhaust soot directly into the intake manifold, baking into sticky carbon sludge and introducing severe coolant leak risks. Additionally, removing factory sensors leaves exposed wiring harnesses vulnerable to water and debris.
Key Features
- Rapid Turbo Spool & Response: Reduces backpressure directly off the turbine housing, allowing the L5P VGT turbocharger to spool up noticeably faster.
- Stops Intake Carbon Sludge & Coolant Leaks: Removes the factory EGR cooler, stopping abrasive soot from choking intake valves and eliminating internal coolant loss risks.
- Weatherproof CAN-BUS Plugs: Comes with specialized connector plugs that seal disconnected factory sensor wiring harnesses, keeping moisture, dust, and corrosion out of electrical system.
- Reduces EGTs & Eliminates DPF Regens: Replaces restrictive exhaust canisters and downpipe crimps to end fuel-draining active regenerations and drastically lower EGTs.
FAQ
Q: What is the main difference between the 2020–2023 L5P kit and the earlier 2017–2019 version?
A: Both kits include the same core upgrades: a 3.5" downpipe, 4" exhaust pipe, and EGR delete components. The main difference is the CAN Bus plug configuration, which is matched to the specific electrical systems of each model year range.
Q: What performance gains should I expect from combining the 3.5" Downpipe with the 4" DPF Delete Pipe?
A: The factory downpipe restricts flow with flattened bends at the turbo outlet, while the DPF creates additional backpressure. Upgrading to a 3.5" downpipe and 4" race pipe improves exhaust flow, lowers EGTs, and helps the turbo spool more efficiently.
Q: How does deleting the EGR cooler benefit the 2020–2023 Duramax L5P engine?
A: Removing the factory EGR cooler prevents exhaust soot from entering the intake, reducing carbon buildup, lowering intake temperatures, and helping prevent coolant leaks caused by EGR cooler failures.
Q: Is custom ECM tuning required after installing this product?
A: Yes. Removing DPF, EGR, and emissions components changes ECM feedback signals. Proper ECM tuning is required to disable DTCs, clear CEL warnings, and prevent limp/derate mode.
