The Injen Technology intake system is a high-performance, dyno-proven system made of CNC mandrel bent 6061 T-6 aluminum alloy. Each intake is carefully engineered for a perfect fit and superior performance. Many other intakes in the market are made of 3.00" diameter tubes. This may cause friction between the battery and the intake system, dented hoods and an unbalanced air fuel ratio which can be harmful to your engine. Injen Technology has taken extra measures to ensure that the consumer get's what they paid for: optimum throttle response.