Diamond Eye Manufacturing 321055 Performance Exhaust Pipe 2001-2004 Chevy/GMC 6.6L LB7 Duramax 2500/3500

The Diamond Eye Manufacturing 321055 is a performance exhaust pipe designed for 2001–2004 Chevrolet and GMC 2500/3500 pickup trucks equipped with the 6.6L LB7 Duramax diesel engine. Compatible with all cab and bed length configurations, this direct-fit exhaust component is engineered to reduce exhaust backpressure, improve exhaust flow, and deliver gains in horsepower and torque compared to the restrictive factory exhaust system.

Diamond Eye Manufacturing produces this pipe using CNC mandrel bending technology, which ensures consistent bend radii without collapsing or crimping the tube walls. This maintains full interior diameter throughout the pipe's length for maximum flow efficiency. The component is available in aluminized or stainless steel construction depending on variant, offering corrosion resistance suited to harsh operating environments.

Key Features:

• Direct-fit replacement designed for 2001–2004 Chevy/GMC 2500/3500 LB7 Duramax diesel trucks
• Compatible with all cab and bed length configurations
• CNC mandrel-bent tubing for unrestricted exhaust flow and no wall deformation
• Reduces exhaust backpressure to support improved engine performance
• Available in aluminized or stainless steel construction for long-term durability
• Precision fabricated for accurate fitment with OEM mounting points
• Designed to pair with Diamond Eye cat-back or turbo-back exhaust systems

Diamond Eye Manufacturing is a leading producer of aftermarket diesel exhaust components, with decades of experience in mandrel-bent exhaust fabrication. The 321055 is a quality upgrade for Duramax owners looking to reduce restriction and enhance the sound and performance of their diesel truck's exhaust system.