aFe 51-74008 Momentum HD CAI for 17-19 Chevy/GMC Silverado/Sierra 6.6L L5P

Vehicle Fitment

• 2017-2019 Chevrolet Silverado 2500 HD (V8-6.6L Duramax L5P)
• 2017-2019 Chevrolet Silverado 3500 HD (V8-6.6L Duramax L5P)
• 2017-2019 GMC Sierra 2500 HD (V8-6.6L Duramax L5P)
• 2017-2019 GMC Sierra 3500 HD (V8-6.6L Duramax L5P)

Features

• aFe Momentum HD Pro DRY S cold air intake system with sealed housing
• One-piece roto-molded housing with built-in sight window for quick filter inspection
• High-quality CAD-designed roto-molded intake tube for optimized airflow
• Massive Pro DRY S dry synthetic 360° radial flow air filter for excellent filtration
• Improves airflow up to approximately 66 % over stock intake
• Boosts performance with up to +15 HP and +37 lb-ft torque gains
• Premium hardware and clamps for secure, reliable installation
• Direct bolt-on fitment - no cutting, drilling, or modifications required

Specifications

• Part Number: 51-74008
• System Type: Sealed cold air intake with Pro DRY S dry synthetic air filter
• Airflow Increase: Up to ~66 % over factory intake
• Performance Gains: Up to +15 HP and +37 lb-ft torque (engine dependent)
• Housing Material: Black cross-linked polyethylene one-piece design
• Tube Material: CAD-designed roto-molded plastic tube
• Filter Media: Progressive synthetic dry media (Pro DRY S)
• Emissions: Not CARB exempt - not legal for sale/use in California or CARB states

Included Components

• 1x Pro DRY S dry synthetic air filter
• 1x One-piece sealed housing with sight window
• 1x CAD-designed roto-molded intake tube
• 1x Full set of premium clamps
• 1x Complete mounting hardware kit

Product Description

The aFe 51-74008 Momentum HD Cold Air Intake with Pro DRY S filter is a high-performance replacement intake system engineered for 2017-2019 Chevrolet Silverado and GMC Sierra 2500 HD/3500 HD trucks equipped with the 6.6L Duramax L5P diesel engine. Designed around a massive 360° radial flow dry synthetic Pro DRY S air filter and a one-piece roto-molded housing with sight window, this intake delivers significantly increased airflow - outflowing the factory intake by as much as ~66 %. That translates to measurable performance gains, with up to +15 HP and +37 lb-ft of torque improvements, plus a more responsive driving feel.

Installation is straightforward with direct bolt-on fitment using high-quality premium clamps and hardware, and no cutting or drilling of stock components is necessary. The sealed housing design helps isolate the filter from engine heat, ensuring cooler, denser air reaches the engine for optimal combustion efficiency. This system is ideal for Duramax owners seeking a performance edge in towing, hauling, or everyday driving. Note: this part is not CARB exempt and therefore not legal for sale or use in California or other CARB-adopted states.