FITMENT
- 2017-2023 6.6L Silverado & Sierra Duramax 2500HD/3500HD trucks.
- Fit Crew Cab, Double Cab, Regular Cab with Standard/Long Bed.
- Does NOT Fit: 3500/4500/5500 Cab & Chassis commercial models.
DESCRIPTION
Product Overview
- The 17-23 6.6L Duramax L5P is an absolute towing monster, but its potential is heavily locked down by a massive, triple-layer emissions block (DPF + SCR + CAT) mounted directly under the cab.
- As these trucks clock high miles, the dense ceramic substrate permanently plugs with soot and unburnable ash. This triggers constant, fuel-guzzling Active Regeneration cycles that drop fuel economy to a miserable 12-14 MPG.
- Worse yet, the L5P emission control network is incredibly fragile. Redundant DEF tank heater failures, failing fluid pumps, and drifting NOx sensors will instantly trigger a 55 MPH Limp Mode countdown.
Key Features
- Premium T-409 Stainless Steel Build: Constructed from high-grade industrial T409 SS highly optimized to expand and contract under intense thermal cycling without cracking, warping, or scaling.
- Continuous 4" CNC Mandrel-Bent Tubing: Crafted with smooth, uniform 4-inch diameter paths featuring zero internal neck-downs or restrictive bungs to ensure maximum high-RPM exhaust velocity.
- Substantial Heat & EGT Reduction: Removes the massive ceramic heat-trap from under the cab, letting scorching exhaust gases escape instantly to keep engine and transmission temperatures low under load.
- True Direct-Fit Mid-Section Drop: Precision-engineered to replace only the bulky DPF and CAT filter blocks while matching the exact length and factory flange positions to reuse your stock rear tailpipe.
FAQ
Q: Does this kit replace the entire exhaust system to the back of the truck?
A: No. This is a Mid-Section Delete Pipe (DPF/CAT Delete). It is engineered to precisely replace the heavy emission canisters (DPF & SCR) located directly under the cab. It terminates exactly where your factory rear tailpipe begins, allowing you to bolt your original factory rear section right back onto this pipe.
Q: Will this stop my truck's DEF countdown timers and sensor failures?
A: Yes, it deletes the SCR, meaning you no longer need DEF. This system completely eliminates the factory under-cab emissions assemblies. Once installed alongside your delete software, the entire DEF injection pump, tank heaters, and NOx tracking sensors are fully deactivated.
Q: What should I do with the exposed factory wiring plugs left under the truck?
A: You must seal them to prevent corrosion and electrical shorts. Leaving unplugged factory connectors open to road salt, mud, and water can destroy your sensitive electronics. We highly recommend grabbing a Tuner Harness Plug Kit to snap perfectly over factory plugs for a clean, weather-sealed finish.
Q: Why should I install an L5P CCV Reroute Kit along with this EGR delete?
A: To completely stop tar-like sludge from choking your intake. Deleting the EGR stops dry soot, but the factory CCV still dumps sticky oil mist that coats turbo blades and pools in the intercooler. Pairing this with our L5P CCV Reroute and EGR Delete eliminates brittle plastic factory fittings and routes oil vapor away from the intake track for 100% clean airflow.
