Perrin Catback Resonated Quad Tip WRX / STI Sedan (2011-2018) Porsche If you want to make

If you want to make sure what type of coolant your Subaru uses simply take a look at your coolant

the sound of your blowoff valve will be much more prominent

precision construction

without droning or annoying at cruising speeds

- Available in Red

Perrin Catback Resonated Quad Tip WRX / STI Sedan (2011-2018) Porsche If you want to makeGet yourself a great sounding, high quality catback exhaust for your 2011 2017 WRX or STI sedan with Perrin's brushed steel finish. Straight Through Mufflers: PERRIN Performance mufflers have a true 2. 5" internal diameter for uninterrupted exhaust flow. PERRIN mufflers and flange connections are equal throughout the entire length, not necked down, for ultra smooth transitions throughout the system. 3. 5" Slash Cut Tips: Oversized 3. 5" slash cut