Invidia [15-21 WRX] [15-21 WRX STI] Gemini R400 Cat-Back Exhaust - Titanium Quad Tips

The Invidia Gemini R400 Cat-Back Exhaust for the 2015-2021 Subaru WRX and WRX STI Sedan is the benchmark cat-back for the VA chassis, balancing strong flow with an aggressive tone. Built from 3-inch (76mm) SUS304 stainless steel with mandrel-bent piping and CNC-machined flanges, the system delivers a deep, pronounced exhaust note throughout the entire RPM band while staying composed at highway cruise. It exits through quad 101mm (4-inch) single-layer burnt titanium tips for Invidia's signature rear-end statement, and hangers welded onto the OEM locations make installation a direct bolt-on.

• 2015-2021 Subaru WRX & WRX STI Sedan (VA chassis)
• 3-inch (76mm) SUS304 stainless steel mandrel-bent piping, CNC-machined flanges
• Quad 101mm (4-inch) single-layer burnt titanium tips
• Deep, aggressive exhaust note; refined at cruise
• OEM-location hangers; new gaskets and hardware included
• A stock-DP-to-aftermarket-cat-back adapter (e.g. GrimmSpeed 077046) is required with a stock downpipe
• Part number: HS15STIGM4ST