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

The Dieselr Aluminized Downpipe Back Exhaust Single (2001–2004.5 6.6L Duramax LB7) is built for Chevy Silverado and GMC Sierra 2500/3500 owners who demand a clean fit, stronger flow, and long-lasting reliability. Crafted from 4-inch and 5- inch  heavy-duty aluminized steel, this system improves exhaust performance, reduces EGTs, and provides a deep, refined tone under load.

Each Dieselr exhaust is mandrel-bent for smooth, unrestricted flow and precision-welded for durability. The aluminized finish resists rust, corrosion, and heat fatigue—perfect for work trucks and daily-driven Duramax platforms. It mounts directly to OEM hangers for a secure, factory-style fit that installs easily without cutting or welding.

Dieselr systems are tested on real 6.6L Duramax trucks for verified fitment and field performance. This is exhaust engineering done right—built strong, built simple, built to last.

Key Features

• 4", 5" aluminized steel construction for long-term strength
• Mandrel bends for smooth, efficient flow
• OEM hanger alignment for clean installation
• Corrosion-resistant finish for durability in harsh conditions