This K&N intake is perfect for Subaru Impreza WRX and WRX STI owners who want to enhance their car's performance. Whether you're a daily commuter on the highway or a weekend racing enthusiast, it can give your engine a power boost. The system has a mandrel - bent aluminum intake tube and an oversized conical filter. Under normal driving conditions, you can go up to 100,000 miles before servicing the filter. And it's easy to install, taking less than 90 minutes.