K&N Cold Air Intake System: High-Flow Air-Filter, Increase Performance & Horsepower: Compatible with 2008-2014 SUBARU Impreza WRX STi; 69-8005twr

GUARANTEED INCREASE IN HORSEPOWER & TORQUE: K&N cold air intake systems provide a less restrictive path for airflow, increasing the volume of cool, oxygen-rich air into your engine an increase in horsepower and torque. HEAR THE GROWL: K&N’s intake systems allow your engine to breathe and sound as it should- your engine will growl on acceleration and return to quiet once at speed. DYNO TESTING YOU CAN TRUST: K&N air intake horsepower/torque testing is performed on wheel-based dynamometers and the reports are include with each intake system. BETTER ACCELERATION: K&N’s cold air intake kit improves acceleration and uphill performance by improving throttle response and overall horsepower and torque. FEATURING K&N’s SIGNATURE, REUSABLE AIR FILTER: Combines 4 layers of pleated, breathable cotton with K&N’s red filter oil to absorb dirt and dust particles, allowing clean air to continue flowing into your engine, only needs cleaning every 100,000 miles