FITMENT
- 2015.5-2016 6.6L Silverado & Sierra Duramax 2500HD/3500HD LML engine models with the 3-bolt flange.
- Does NOT Fit 2011-2015.5 model with the V-Band Clamp style.
- Please physically inspect underneath truck to verify your turbo discharge style before purchasing!
DESCRIPTION
Product Overview
-
OEM emissions hardware on 6.6L Duramax LML engines imposes major thermal and flow trade-offs under heavy load. The stock DPF assembly generates heavy turbine backpressure that traps extreme Exhaust Gas Temperatures (EGTs) directly behind the turbocharger, while the factory EGR loop feeds carbon-rich exhaust gases straight into the intake manifold—combining with oil mist to form a thick, flow-restricting sludge across intake runners.
- Engineered to eliminate both primary flow bottlenecks, this LML 4" DPF & EGR Delete Package replaces restrictive stock components with a smooth 4" competition pipe and precision EGR block-off hardware. By relieving exhaust backpressure and isolating dirty soot from your intake air, it improves exhaust flow velocity, accelerates turbo spool, and keeps working EGTs significantly lower under heavy strain.
Key Features
- Uses 3-bolt flange geometry to bolt up directly to late-15.5–16 trucks with a leak-free fit.
- Swaps the DPF for a smooth 4" pipe that sheds backpressure and stops the fuel-draining regen cycles.
- Keeps the turbo, intercooler, and intake dry by deleting the EGR cooler and rerouting the CCV oil mist.
- Consolidates the exhaust, EGR, and CCV work into one pass around the tight rear engine bay to save shop time.
FAQ
Q: What does the 4" downpipe-back exhaust deliver?
A: The 4" system replaces the restrictive factory components to improve flow, cut restriction, and reduce heat buildup under heavy-duty driving.
Q: What does the CCV/PCV reroute accomplish?
A: It keeps oil vapor and crankcase contaminants from being drawn back into the intake, so the intake tract stays cleaner and the turbo and intercooler stay drier over time.
Q: Does this improve towing?
A: Yes. By lowering exhaust restriction and improving airflow, it supports stronger exhaust flow during towing and heavy-load work.
Q: Will it fit cab & chassis trucks?
A: This kit is made for standard Silverado HD and Sierra HD pickups. Cab & chassis models may need extra modifications and should be verified before ordering.
