K&N Cold Air Intake Kit: High Performance, Guaranteed to Increase Horsepower: Fits 2001-2007 Chevy/GMC Heavy Duty (Silverado 2500, Silverado 3500, Sierra 2500, Sierra 3500) 6.0L V8, 57-3031-1
Brand: K&N


ULTIMATE LONGEVITY: 10-Year/Million Mile Limited Warranty protects for the life of your vehicle.
GUARANTEED INCREASE IN HORSEPOWER: Dyno-tested with up to 50% more airflow than restrictive factory box air filter and intake tube
BETTER TOWING: Improves acceleration and uphill performance when towing by improving throttle response.
IMPROVED ENGINE SOUND: Hear the power under the hood.
WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants