3'' Downpipe Exhaust for 2004.5-2010 6.6L Duramax LLY LBZ LMM

Upgrade your 2004.5–2010 6.6L Duramax (LLY/LBZ/LMM) with this 3" downpipe exhaust, engineered to replace the restrictive factory unit and improve exhaust flow. Crafted from 201 stainless steel with a polished surface finish, it delivers durable corrosion resistance and a clean under-hood appearance. The 3-inch mandrel-bent design reduces backpressure, supports quicker turbo spool, and helps unlock more usable power and torque across the RPM range.

Key Features

• 3" Diameter: Larger-than-stock tubing for improved exhaust flow and reduced backpressure
• 201 Stainless Steel: Strong, corrosion-resistant construction built for daily driving and performance use
• Polished Surface: Smooth mirror-like finish for a premium look under the hood
• Mandrel-Bent Tubing: Smooth bends maintain consistent flow diameter throughout
• Performance Gains: Supports faster turbo response and increased horsepower & torque output
• Hardware Included: Comes with necessary gaskets and mounting hardware for a complete install