Invidia [15-21 WRX/STI] Gemini R400 Signature Series Black Tip Cat-Back Exhaust
The Invidia Gemini R400 Signature Series Cat-Back Exhaust with quad black tips is engineered for the 2015-2021 Subaru WRX and WRX STI sedan, filling the sound gap between Invidia's Q300 and N1 systems with a unique, aggressive note that minimizes harsh cabin noise - particularly at highway speeds. The R400 muffler was designed using years of Invidia engineering experience to balance unrestricted exhaust gas flow with sound dampening, while 76mm (3-inch) 304 stainless steel mandrel-bent piping with minimal bends improves horsepower, torque, and throttle response. It finishes with quad 4-inch (101mm) slash-cut single-layer black tips, and installs directly with new gaskets and hardware included.
- Fits 2015-2021 Subaru WRX and WRX STI (sedan)
- R400 Signature Series: aggressive race-inspired note, minimized highway drone
- 76mm (3-inch) 304 stainless steel piping, split to 60mm; resonated mid-pipe
- Quad 4-inch (101mm) slash-cut single-layer black tips
- Tuned mufflers; cast flanges; hangers welded at OEM locations
- New gaskets and hardware included
- Invidia part HS15STIGM4SB
Products received may vary slightly from images due to manufacturing tolerances or supply chain variables.
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