GM Duramax 6.6L Down-pipe (2001-2004)

Vehicle Fitment

This 3" 2001-2004 Duramax Downpipe is specifically designed for 2001-2004 Chevrolet Silverado & GMC Sierra 2500 & 3500HD models with the 6.6L Duramax engine.

However, it does not fit Cab & Chassis trucks.

Performance Improvement

By upgrading to this turbocharger downpipe, you will improve exhaust flow significantly. The less restrictive 3" stainless steel design allows your engine to breathe more easily. As a result, the improved airflow reduces exhaust gas temperatures (EGTs), making the engine run more efficiently, especially under heavy loads or competitive driving conditions.

Enhanced Features

This downpipe improves flow by 20% compared to the stock pipe, making it perfect for high-performance or competition settings. Additionally, the included heat-wrap helps insulate the engine bay, lowering overall temperatures and enhancing heat retention where it matters most. Since the downpipe also includes a gasket, installation becomes more straightforward and ensures a proper seal. Importantly, this performance upgrade does not interfere with emissions systems, allowing for compliance without sacrificing power.

Key Benefits of 2001-2004 Duramax Downpipe :

• 3" stainless steel piping for enhanced durability
• 20% improvement in exhaust flow
• Heat-wrap keeps engine bay temperatures down
• Gasket included for secure, easy installation
• Ideal for competition or heavy-duty applications