2004.5-2010 6.6L Chevy GMC Duramax Passenger Side Up-Pipe & 3" Downpipe Exhaust

Replaces the restrictive, factory-crushed oval downpipe and weak up-pipe with a smooth 3-inch mandrel-bent design to dramatically improve exhaust flow and lower EGTs.

Precision TIG-welded from thick-walled T-304 stainless steel with rigid CNC-machined flanges to resist warping, high pressure, and rust.

Features robust, multi-layer flex sections on the heavy-duty passenger-side up-pipe to absorb extreme thermal expansion and permanently prevent pre-turbo boost leaks.

Instantly drops backpressure right behind the turbo to unleash faster spooling, sharper throttle response, and a deeper, throatier turbo whistle.

Fit: 2004.5–2010 Chevrolet Silverado and GMC Sierra 2500HD / 3500HD trucks equipped with the 6.6L Duramax LLY, LBZ, or V8 LMM diesel engine (Note: Will not fit Cab & Chassis models).