Dieselr Aluminized 4" CAT Back Exhaust Single | 2500/3500 6.6L GM DURAMAX LB7 (2001-2004.5)

The Dieselr Aluminized 4" Cat Back Exhaust Single (2001–2004.5 6.6L Duramax LB7) is built for Chevy Silverado and GMC Sierra 2500/3500 owners who need a reliable, performance-focused exhaust system that lasts. Constructed from 4-inch heavy-duty aluminized steel, it provides smoother exhaust flow, a refined diesel tone, and long-term corrosion resistance.

Each Dieselr cat back system is mandrel-bent for consistent, unrestricted flow and precision-welded for durability. The aluminized finish withstands heat, moisture, and road salt, making it ideal for daily-driven or work-heavy Duramax trucks. Installation is simple with OEM hanger alignment, ensuring a clean fit without modifications.

Engineered and tested on real 6.6L Duramax platforms, Dieselr’s aluminized cat back systems deliver dependable flow and fitment you can trust—no noise, no gimmicks, just results.

Key Features

• 4" aluminized steel construction for long-term reliability
• Mandrel bends for smooth, efficient exhaust flow
• OEM hanger fitment for easy installation
• Corrosion-resistant finish for lasting durability