Invidia N1 Cat-Back Exhaust 2015-2021 WRX/STI

N1 offers an aggressive look and sound at a reasonable price point. Every Invidia exhaust is constructed with high-quality 304 stainless steel, CNC-machined flanges, and manufactured with a polished finish. Each system features mandrel-bent stainless steel piping for maximum exhaust flow and reduced back pressure. These exhausts are engineered to produce strong mid to top-end power gains, as well as an increase in horsepower and torque. 3" piping throughout, with dual 4" tips. Choose between burnt titanium (shown here) or polished stainless steel slash-cut exhaust tips. Fits all 2015-2021 Subaru WRX and WRX STI. Availability note: Supply on Invidia products has been spotty. Please call about product availability before ordering. Updated 6/18/25