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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On 6.6L Duramax L5P trucks, the crushed OEM downpipe and heavy DPF canister create intense turbine backpressure that heat-soaks the firewall area and triggers fuel-wasting regenerations. Simultaneously, the factory EGR circuit feeds hot, abrasive soot into the intake manifold, risking internal cooler core cracking, while unplugged emissions sensors leave exposed harness ends vulnerable to water, road grime, and corrosion.
- Built for total flow relief and electrical protection, this L5P Downpipe, DPF & EGR Delete Kit with Weatherproof Plugs replaces restrictive exhaust hardware with free-flowing plumbing and precision block-off plates. By eliminating backpressure and isolating exhaust recirculation, it slashes operating EGTs, prevents internal cooler leaks, and includes sealed dummy plugs to keep your factory sensor harness dry and corrosion-free.
Key Features
- Combines a smooth 4" DPF delete pipe with a 3.5" downpipe to open up exhaust flow and quicken turbo spool.
- Ends regens and drops EGTs by deleting the primary backpressure and fuel-wasting regen cycles of the factory setup.
- Removes the EGR loop to keep soot out of the intake and stop carbon buildup and cooler leak risks for good.
- Seals the disconnected factory sensor connectors with CAN-bus plugs to shield the wiring from moisture and corrosion.
FAQ
Q: Does this fit the 2017–2019 L5P?
A: No, it’s made for 2020–2023. The 2017–2019 trucks run a different factory configuration and need their own dedicated kit.
Q: Is a custom tune required?
A: Yes. Removing the factory emissions hardware will set codes and derate the engine until a delete tune disables the monitoring sensors.
Q: Does the downpipe come with the kit?
A: Yes — it’s a complete package that includes the 3.5" downpipe, the 4" DPF delete pipe, the EGR delete components, and the CAN-bus plugs for the factory connectors.
Q: Will the exhaust sound change?
A: Yes. With the factory DPF removed, expect a deeper diesel tone and a more aggressive note, along with noticeably less backpressure than the stock system.
