aFe MagnumFLOW Air Filters UCO P5R A/F P5R 5F x 6-1/2B x 4-3/4T x 7H 2002-audi-s4-avant-esi4223574 It requires both the Front

It requires both the Front & Rear panel for installation

It had dual 4" carbon fiber tips with black anodized centers on each muffler

adjustable fuel pressure regulator

AA1-HDR6 kit features ACT's most popular Heavy Duty pressure plate

Supports flow for racing and Motorsports vehicles up to 500 horsepower

aFe MagnumFLOW Air Filters UCO P5R A/F P5R 5F x 6-1/2B x 4-3/4T x 7H 2002-audi-s4-avant-esi4223574 It requires both the FrontConstructed with 100 percent polyurethane on top and bottom, this high flow, oiled performance filter is our highest flowing media for improved horsepower and torque. Five layers of progressively finer mesh cotton gauze media provide maximum airflow for best performance results. Washable and reusable for multiple cleaning cycles, the tall open evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings.