Invidia 2015+ Subaru WRX / STI Gemini/R400 Single Layer Quad Black Tip Cat-Back Exhaust

The Invidia Gemini R400 (P/N: HS15STIGM4SB) is a high-performance cat-back exhaust system with single-layer quad black tips designed for the 2015-2021 Subaru WRX and WRX STI. It is engineered to improve exhaust flow, increase horsepower and torque, and enhance throttle response, while delivering an aggressive exhaust note. The system features 304 stainless steel piping with a 76mm diameter, splitting to 60mm, and 101mm quad slash-cut black tips. The mufflers have a flat bottom, continuous piping design, and utilize Advantex material for optimal sound and performance. It includes cast flanges, machine-welded construction, exhaust hangers welded to OEM locations, and comes with new gaskets and hardware for installation.