Autometer Stack 52mm 0-1 Bar M10 Male Pro Stepper Motor Fuel Pressure Gauge - Black Axles The restrictive factory air filters

The restrictive factory air filters and air intake housings are replaced by the K&N Typhoon air intake system which is designed to dramatically reduce air flow restriction as it smoothes and straightens air flow

4 inch diameter tube

mandrel-bent aluminum tube air induction system designed to fit some Subaru Impreza and WRX models

Gain an extra 12-15 hp and retain your factory idle and low-speed emissions with Skunk2's Tuner Series Stage 1 Camshafts

Autometer Stack 52mm 0-1 Bar M10 Male Pro Stepper Motor Fuel Pressure Gauge - Black Axles The restrictive factory air filtersStack Professional Stepper Motor precision auxiliary instruments combine digital microprocessor accuracy with a high precision stepper motor needle movement, to provide a new level of accuracy and reliability in 52mm gauges. They combine the durability and readability of 270" mechanical gauges with the easy installation and safe operation of conventional electric gauges. The 270" dialface together with the new white LED backlighting and illuminated