aFe 51-74001 Momentum HD Cold Air Intake for 01-04 Chevy/GMC 6.6L Duramax

Vehicle Fitment

• 2001-2004 Chevrolet Silverado 2500 HD (6.6L Duramax V8 Turbo Diesel)
• 2001-2004 Chevrolet Silverado 3500 (6.6L Duramax V8 Turbo Diesel)
• 2001-2004 GMC Sierra 2500 HD (6.6L Duramax V8 Turbo Diesel)
• 2001-2004 GMC Sierra 3500 (6.6L Duramax V8 Turbo Diesel)

Features

• Momentum HD sealed cold air intake engineered for Duramax 6.6L diesel
• Massive Pro DRY S performance dry air filter with multi-layer synthetic media
• One-piece sealed housing draws cooler outside air for improved charge density
• Clear sight window allows quick on-vehicle air filter inspection
• CAD-designed, dyno-tuned roto-molded intake tube for optimized airflow
• Premium stainless steel T-bolt clamps and reinforced silicone couplers
• Significant airflow gains over stock intake for enhanced performance
• Direct bolt-on installation with no cutting or drilling required

Specifications

• Brand: aFe POWER
• Part Number: 51-74001
• Series: Momentum HD Cold Air Intake
• Engine Compatibility: 6.6L Duramax V8 Turbo Diesel (LB7)
• Filter Type: Pro DRY S dry synthetic media, washable/reusable
• Airflow Increase: Approx. +32% over factory intake
• Estimated Gains: Up to +24 HP and +44 lb-ft torque
• Fitment Type: Direct replacement cold air intake

Included Components

• 1x Momentum HD sealed intake housing with auxiliary scoop
• 1x Roto-molded high-flow intake tube
• 1x Pro DRY S performance air filter
• 2x Premium stainless steel T-bolt clamps
• 1x Reinforced silicone coupler
• All necessary mounting hardware

Product Description

The aFe POWER 51-74001 Momentum HD Cold Air Intake System is engineered as a performance upgrade for 2001-2004 Chevrolet Silverado and GMC Sierra heavy-duty trucks equipped with the 6.6L Duramax LB7 turbo diesel engine. Designed around a large Pro DRY S dry synthetic performance air filter and a sealed housing, this intake system dramatically increases airflow compared to the restrictive factory intake, resulting in improved throttle response, horsepower, and torque.

Featuring a CAD-designed, dyno-tuned roto-molded intake tube and premium hardware, the Momentum HD intake delivers measured increases in airflow - up to approximately 32% more than stock - and dyno-proven gains up to +24 HP and +44 lb-ft of torque. A clear sight window makes it easy to inspect the filter without disassembly, and the direct bolt-on installation requires no cutting or drilling. This intake is ideal for Duramax owners seeking stronger performance and better engine breathing for towing, hauling, or daily driving without sacrificing filtration efficiency.