The 4" Downpipe-Back DPF Delete Exhaust for the 2007.5-2010 LMM Duramax pulls the Diesel Particulate Filter (DPF) and catalytic converter (CAT) off your Silverado or Sierra for good. That ends the forced regen cycles, cuts exhaust backpressure, and lets your 6.6 Duramax pull the way it's capable.

Here's how it works: this 4" aluminized steel exhaust runs from the downpipe back to the rear of the truck, replacing the factory DPF and CAT sections. OEM-style hangers and clamps lock it in place just like the factory system, so there's no fabrication and no welding. One thing to know up front: on these 2007.5-2010 LMM models, the front hangers are not used. The pipe is self-supporting without them, and that's completely normal.

In the box you get the 4" aluminized steel full exhaust, the OEM-style hangers and clamps, and a step-by-step installation guide. Nothing else to source. It fits all cab and box lengths on the Silverado and Sierra 2500HD and 3500HD, though Cab & Chassis trucks aren't covered.

Once that DPF backpressure is gone, the LMM breathes free. Your turbo spools faster, EGTs drop under towing loads, and most owners notice stronger throttle response along with better fuel economy on highway and towing runs. You'll need a compatible delete tune to keep DPF-related check engine codes away, so call us at (888) 830-2588 if you need help pairing the right tuner. Shipping is included.

For off-road/competition use only.