aFe Magnum FLOW Universal Air Filter - 4in Flange x 9in Height - Dry PDS Shrouds Perrin 15-17 Subaru WRX Super

Perrin 15-17 Subaru WRX Super Shifter Stop (w/PERRIN Short Throw Shifter)

3 66MM Hub Wide Tread Spacers - 20MM

GFB's unique patented venting bias adjustment system allows you to adjust the sound of the blow off valve - it allows the amount of air vented to atmosphere or recirc to be infinitely varied to change the sound from silent to ear-shattering or anywhere in between

This is the next generation Focus ST Intake which features OEM-like fitment across all model years and an updated wrinkle black powdercoat finish

aFe Magnum FLOW Universal Air Filter - 4in Flange x 9in Height - Dry PDS Shrouds Perrin 15-17 Subaru WRX SuperWith three layers of progressively finer mesh synthetic media between 100% polyurethane top and base, this high flow, "oil free" conical performance filter provides maximum convenience and easy maintenance with excellent airflow. Washable and reusable for multiple cleanings, the tall open evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings. Pliable polyurethane flange with integrated bumps insures