The Evolution of cold air intakes is here. The Evolution cold air intake system by Injen Technology is the next generation of performance intake systems. The EVO7008 is specifically engineered for the 2001-2004 GM Diesel trucks with the 6.6L LB7 Duramax engine. Every EVO7008 cold air intake is made in the USA from cross linked high density polyethylene for extreme durability. They include stainless steel hardware and automotive grade urethane couplers. No cutting or drilling required for an easy installation process that does not require aftermarket tuning for exceptional HORSEPOWER and TORQUE GAINS. , , The EVO7008 was precisely tuned and tested on our in-house dyno to replicate stock fueling while increasing horsepower and torque. The EVO7008 system features our 2-piece box design that incorporates our boost plenum, a massive 360? SuperNano-Web dry air filter, a smooth Rotomolded induction tube for reduced restriction levels, and premium hardware. Every Injen Evolution air induction system utilizes Injen's proprietary SuperNano-Web dry air filters. The Evolution induction systems utilize some of the largest filters on the market employing super deep filter pleats, with some measuring over 1.25"deep! This particular intake kit also features our SHUR-LOCK mounting system on the air filter to ensure a non-slip seal. The EVO7008 cold air intake system was designed to use the maximum space available under the hood to ensure optimum breathing room and extreme performance. The Evolution can't be stopped?.. Roto-molded Housing and Boost Plenum; The EVO7008 system features our 2-piece box design that incorporates our boost plenum. Designed 100% in 3D ensures a hassle free, drop-in installation. Roto-molded Intake Tube; The EVO7008 Evolution Cold Air Intake System uses a custom designed and dyno-tuned intake tube to produce huge power gains while retaining an OE quality fit. , ,