Active Autowerke Rear Exhaust System 3 Can W/ Valves (Maad Maxx) - 2014+ M3 / M4 (11-073B) 1409 Seibon recommends professional installation and

Seibon recommends professional installation and transferring the stock hood heat shield for finish preservation

The Injen SP1209 Short Ram Air Intake is the next logical step in your search for power gains for your 2015-2021 Subaru WRX equipped with the H4-2L Turbo engine

Our AOS will allow your engine to run more efficiently due to the separation of oil from the intake system

(2) Clamps

Active Autowerke Rear Exhaust System 3 Can W/ Valves (Maad Maxx) - 2014+ M3 / M4 (11-073B) 1409 Seibon recommends professional installation andThe Active Autowerke Rear Exhaust System 3 Can with Valves (Maad Maxx) is designed specifically for the 2014+ F80 BMW M3 and F82 BMW M4. Engineered to improve exhaust flow and sound, this axle back system replaces the factory rear exhaust to provide a deep, refined tone suited for an "M" car. Constructed in the USA Valved exhaust design for adjustable flow Double canned mufflers reduce resonance Flex joints present to minimize vibration Test fit on