• Invidia R400 Gemini Cat Back Exhaust Quad Titanium Tip WRX/STI 2011-2014 Sedan | HS11STIGM4ST

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R400 Gemini Cat-Back Exhaust - Quad Titanium Tips

Fits: 11-14 WRX/STI Sedan

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Invidia R400 Gemini Cat-Back Exhaust - Quad Titanium Tips
Fits: 11-14 WRX/STI Sedan
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Fitment

Please Note: Fits 2011-2014 Subaru WRX and WRX STI Sedan (GV chassis; per legacy Invidia application data and product title lineage). Invidia R400 Gemini cat-back, part HS11STIGM4ST: 76mm SUS304 stainless steel piping, quad 101mm single-layer burnt titanium tips, R400 muffler. Sedan-only system: the 2008-2010 US STI was hatch-only, so the 2008-2014 STI bucket was removed 2026-10-06. No 2011-2014 WRX STI bucket exists in the fitment taxonomy — 2011-2014 WRX STI sedan coverage documented here (per SMY Performance, Throtl, Kenji Garage, Kamispeed, IAG: 2011-2014 WRX/WRX STI sedan).
  • 2011-2014 Subaru | WRX

Description

The Invidia R400 Gemini Cat-Back Exhaust for the 2011-2014 Subaru WRX and WRX STI Sedan is the benchmark cat-back for the wide-body GV chassis, pairing strong flow with Invidia's signature quad burnt titanium tips. A full 76mm (3-inch) SUS304 stainless steel system with mandrel-bent piping, TIG welding, and polished finish feeds the R400 muffler design for a deep, aggressive exhaust note that stays composed at cruise. New gaskets and hardware are included, and hangers welded onto the OEM locations make it a direct bolt-on upgrade.

  • 2011-2014 Subaru WRX and WRX STI Sedan (GV chassis)
  • 76mm (3") SUS304 stainless steel mandrel-bent piping, TIG welded, polished finish
  • Quad 101mm (4") single-layer burnt titanium tips
  • R400 muffler design - deep, aggressive tone; power gains from increased flow
  • New gaskets and hardware included; OEM-location hangers for direct fitment
  • Note: with a stock downpipe/j-pipe, a stock-DP-to-aftermarket-cat-back adapter may be required (e.g. GrimmSpeed)
  • Part HS11STIGM4ST

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