Photo 1 of K&N Cold Air Intake Kit: Increase Acceleration & Towing Power, Guaranteed to Increase Horsepower up to 16HP: Compatible with 6.6L, V8, 2001-2004 CHEVROLET/GMC (Silverado 2500 HD, 3500, Sierra) 57-3034 50 State Legal

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Photo 1 of K&N Cold Air Intake Kit: Increase Acceleration & Towing Power, Guaranteed to Increase Horsepower up to 16HP: Compatible with 6.6L, V8, 2001-2004 CHEVROLET/GMC (Silverado 2500 HD, 3500, Sierra) 57-3034 50 State LegalPhoto 2 of K&N Cold Air Intake Kit: Increase Acceleration & Towing Power, Guaranteed to Increase Horsepower up to 16HP: Compatible with 6.6L, V8, 2001-2004 CHEVROLET/GMC (Silverado 2500 HD, 3500, Sierra) 57-3034 50 State Legal