The ETS Axle-back exhaust for the 2015-2016 WRX and STI utilizes a full stainless steel construction. The axle back is 2.5" that mates to the stock 2 bolt flange. All gaskets are included to aid in ease of installation. This is the easiest way to get a little bit more noise and performance out of your WRX or STi.
2.5" SS Piping
Quad 3.5" Double Wall tips
Increased Performance and Sound