Diamond Eye K4120A 4-Inch Aluminized Turbo-Back Exhaust System 2004-2005 Chevy/GMC 6.6L Duramax LLY

The Diamond Eye K4120A is a complete 4-inch aluminized steel turbo-back exhaust system engineered specifically for 2004-2005 Chevrolet and GMC 2500/3500 trucks equipped with the 6.6L LLY Duramax diesel engine. This exhaust system fits all cab and bed length configurations, providing a universal solution for your heavy-duty truck.

Key Features:

• 4-inch mandrel-bent aluminized steel construction for maximum exhaust flow and durability
• Turbo-back design replaces restrictive factory exhaust from turbo outlet to tailpipe
• Precision CNC mandrel bending eliminates crimps and restrictions for optimal performance
• Increases horsepower, torque, and fuel economy by reducing backpressure
• Aluminized steel finish provides excellent corrosion resistance at an economical price point
• Direct bolt-on installation with all necessary hardware included
• Fits all 2004-2005 LLY Duramax 2500/3500 models regardless of cab or bed configuration

Diamond Eye Manufacturing utilizes advanced CNC mandrel bending technology to create smooth, consistent bends throughout the exhaust system, ensuring unrestricted exhaust flow and maximum performance gains. This turbo-back system is designed to work with your factory or aftermarket downpipe and provides a significant improvement over the restrictive stock exhaust. Whether you're towing heavy loads or looking for improved throttle response and fuel mileage, the K4120A delivers proven results for LLY Duramax owners.