Fitment Information Chevrolet Silverado 2500HD/3500HD (2001, 2002, 2003, 2004, 2005, 2006, 2007) Engine Type: 8.1L V8 Emissions Compliance This item is CARB/Smog Legal for some applications! See below: 2001-2007c Chevrolet Silverado 2500HD 8.1L V8*2001-2007 Classic OnlyMaxFlow 5 Oiled Filter (CARB EO # D-526-6)DryTech 3D Dry Filter (CARB EO # D-526-6)PowerCore Filter (CARB EO # D-526-8) 2001-2007c Chevrolet Silverado 3500HD 8.1L V8*2001-2007 Classic OnlyMaxFlow 5 Oiled Filter (CARB EO # D-526-6)DryTech 3D Dry Filter (CARB EO # D-526-6)PowerCore Filter (CARB EO # D-526-8) Specs & Features Direct bolt on air intake system Volant air intakes carry a Limited Lifetime Warranty. Filter warranty varies. Volant intakes increase cooler airflow to the engine allowing your engine to operate more efficiently increasing Horsepower & Torque Volant intakes make it easier for the engine to breathe, which should result in improved fuel economy and mileage. Driving style has a far greater impact on gas mileage than an air intake Filter Options Choose a Volant PowerCore air filter for the best filtration on the market with 100,000 Maintenance Free Miles of Driving and perfect for hard conditions Choose a Volant MaxFlow 5 Oiled Filter for improved performance with the comfort of oiled filtration technology for those looking for horsepower Choose a Drytech Dry Filter for improved performance, easy soap and water maintenance, ideal for all cars and trucks for improved performance, easy soap and water maintenance, ideal for all cars and trucks. Product Description Volant air intake systems utilize a high-velocity venturi filter adapter which provides a smooth transition through the MAF sensor into the intake tube for a much needed airflow improvement over the factory rubber tubing and resonator box. Volant's Cool Air box is larger than the factory unit and incorporates a larger opening to collect a higher volume of colder ambient air. Redline360 sells only genuine and authentic Volant products.