17-23 Chevy GMC 2500 3500HD 6.6L L5P Duramax 3.5" Exhaust Downpipe

Constructed from premium-grade stainless steel to deliver superior long-term strength and durability.

Engineered to provide 20% higher exhaust flow compared to the restrictive factory downpipe.

Designed as a full performance upgrade that completely eliminates the factory DOC system.

Features a heavy-duty 3.5-inch stainless steel construction with a precision 4-bolt flange and two pre-installed studs.

Accelerates exhaust gas evacuation from the turbine wheel, unleashing noticeable power and responsiveness.

Deliver an unrestricted path for smooth exhaust scavenging, optimized specifically for high-performance racing trucks.

Fits: 2017-2023 Chevy Silverado and GMC Sierra 2500 / 3500HD 6.6L L5P Duramax Diesel trucks.

Note: Will NOT fit Cab & Chassis models.