Racing Cat-Back Exhaust

• 2008-2014 Subaru | WRX STI
• 2011-2014 Subaru | WRX

The HKS Racing cat-back exhaust is a single-exit system designed for those who value maximum performance — it improves exhaust flow and sound for the 2011-2014 WRX and WRX STI sedan. HKS designed the Hi-Power exhaust with the straightest flow pipe optimized for the vehicle, with increased piping diameter up to 3.5 inches. It is a direct replacement for the OEM exhaust with hangers welded in the OEM locations, so no body modifications are needed.

• Fits 2011-2014 Subaru WRX Sedan and 2011-2014 Subaru WRX STI Sedan ONLY — does not fit hatchback models
• HKS part 31008-BF003
• Single-exit layout; 85mm (3.35") piping with 120mm titanium-finished tip
• SUS304 muffler construction; piping black-coated for rust protection
• Sound level: 95 dB close
• Includes gaskets and hardware; no silencer included
• NOTE: If using the stock downpipe/j-pipe, the GrimmSpeed stock-DP-to-aftermarket-catback adapter (p/n 077046) is required

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