Invidia [15-21 WRX] [15-21 WRX STI] Gemini R400 Cat-Back Exhaust - Stainless Steel Quad Tips
The Invidia Gemini R400 Cat-Back Exhaust for the 2015-2021 Subaru WRX and WRX STI pairs the benchmark R400 Gemini muffler configuration with single-layer polished stainless steel tips for the clean, classic look. A full 76mm (3-inch) mandrel-bent 304 stainless steel system with the aggressive R400 muffler tuning delivers a deep, menacing exhaust note that stands out without being overwhelming, while smooth bends improve horsepower, torque, and throttle response. Quad 4-inch polished stainless steel tips finish the system, and hangers welded onto the OEM locations make it a direct bolt-on upgrade.
- 2015-2021 Subaru WRX + 2015-2021 Subaru WRX STI (VA chassis, sedan)
- 76mm (3") mandrel-bent 304 stainless steel piping, robot-TIG welded, polished
- R400 Gemini tuned mufflers — loudest/most aggressive in Invidia's stainless lineup
- Quad 4" single-layer polished stainless steel tips
- Hangers welded onto OEM locations; new gaskets and hardware included
- With a stock downpipe, an aftermarket DP-to-cat-back adapter (e.g. GrimmSpeed) may be required
- Part HS15STIGM4SS
Products received may vary slightly from images due to manufacturing tolerances or supply chain variables.
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