K&N 02-07 WRX/STi Drop In Air Filter 11in O/S Length / 6.563in O/S Width / 1.063in Height Valve Cover The air filter is placed

The air filter is placed into the original air box space and is protected by a heat shield which is designed to reduce intake air temperature and increase horsepower

Brian Crower Crankshaft - Nissan VR38DETT 94

Torque Solution HKS Blow Off Valve Adapter: Subaru WRX 2008-2012 ONLY

Brian Crower Adjustable Cam Gears for Subaru EJ205/EJ257 (Right Intake Cam Gear Only)

K&N 02-07 WRX/STi Drop In Air Filter 11in O/S Length / 6.563in O/S Width / 1.063in Height Valve Cover The air filter is placedK&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace