Provide increased airflow to your WRX or STI with the Mishimoto Subaru WRX/STI Race Air Intake. Mishimoto designed this intake to be as non-restrictive as possible, featuring a straight 2.75" short-ram intake pipe and designed with maximum airflow in mind. Engineered to fit on either your stock or Mishimoto turbo inlet tube, this intake is also compatible with most aftermarket front-mount intercooler kits. Due to the size of the intake pipe, a retune of your vehicle's ECU is necessary to keep your engine running safe and extracting the most horsepower from the added airflow. The intake pipe also features a CNC air diverter to provide consistent airflow readings to the MAF sensor, making retuning quick and easy. The intake pipe is available in a polished finish to accent any engine bay. A 2.75" diameter Mishimoto high-flow air filter is also included. This filter is specially designed for the small engine bay of the WRX/STI and features a built-in velocity stack for maximum flow.The intake is designed to reuse the stock intake duct to provide fresh outside air to the filter. The Mishimoto Subaru WRX/STI Race Air Intake comes with all of the necessary clamps, couplers, and hardware for an easy install. The Mishimoto Race Air Intake will give your Subaru WRX or STI a highly-aggressive intake tone under acceleration, and it includes the Mishimoto Lifetime WarrantyFeatures:Direct fit for the 2001-2007 WRX and STIInstalls in 30 minutesProvides highly aggressive intake tone under accelerationCNC-machined air diverter helps maintain reliable and consistent MAF readingsWorks with stock or aftermarket induction hosesFits with front-mount intercooler kitsDesigned in Delaware, USA and filter made in USAMishimoto Lifetime WarrantyPipe Diameter2.75"Airbox MaterialAluminumOiled Filter38 g of oil on filterPipe MaterialMandrel-Bent AluminumChassis Codes: GD | GGEngine Codes: EJ205 | EJ255 | EJ257Oil Color: RedAir Filter Part Number: MMAF-2758Purchase Includes(1) Aluminum Intake Pipe(1) High-Flow, Oiled Filter(1) Optional Airbox(1) Silicone CouplerFitment/s:Subaru WRX 2001-2007Subaru STI 2004-2007Saab 9-2x Aero 2005-2006Note/s:Mishimoto recommends that his intake is not used with the stock ECU programming. It is highly recommended that the customer is able to retune the vehicle's ECU after installing the intake. Power gains will vary depending on the type of ECU tune that is applied to the vehicle.Filter re-oil is not included with the lifetime warranty.