2001-2007 Chevy GMC 6.6L Duramax LB7 LLY LBZ 4" Downpipe-Back Race Pipe

Constructed from high-quality T-409 stainless steel to provide exceptional heat resistance and long-lasting durability in demanding conditions.

Features a full 4-inch diameter Downpipe-back design, engineered to optimize exhaust gas evacuation and significantly enhance your engine's performance.

Allows for the complete removal of the restrictive factory catalytic converter, unlocking the full power and torque potential of your Duramax engine.

Engineered with a clean, no-bung configuration to ensure an unobstructed, high-velocity exhaust flow and eliminate internal turbulence.

Improves overall fuel efficiency by reducing exhaust backpressure, providing measurable savings at the pump during daily driving or competition.

Delivers an enhanced exhaust note and ensures optimal thermal management under the chassis.

Fits: 2001-2007 Chevy Silverado / GMC Sierra 2500HD / 3500HD pickup trucks equipped with LB7, LLY, or LBZ 6.6L Duramax engines (Does NOT fit Cab & Chassis commercial models).