The Invidia HS08SW4GST N1 Race cat-back exhaust delivers maximum performance and an aggressive, race-car exhaust tone on the 2008–2014 Subaru WRX and STI Sedan. Full 76mm (3") mandrel-bent stainless steel piping eliminates unnecessary bends to free up restricted horsepower. Without a resonator or flex section, the N1 Race screams at wide open throttle.

N1 Race vs. N1 Street

Both share the same 3" mandrel-bent stainless piping. The Race midpipe has no resonator or flex joint — louder, more aggressive tone. The Street midpipe includes a flex joint and inline resonator for a deeper, more subdued touring sound better suited for daily driving.

Key Features

• 76mm (3") full mandrel-bent stainless steel piping
• No resonator — maximum flow and aggressive race exhaust tone
• Titanium tips
• Includes all necessary hardware and gaskets for installation

Important Note

If running a stock J-pipe or downpipe, the GrimmSpeed Stock DP to Aftermarket 3" Catback Adapter (p/n 077046) is required.

Vehicle Fitment

• 2008–2014 Subaru WRX Sedan
• 2008–2014 Subaru WRX STI Sedan

Specs

• Part Number: HS08SW4GST
• Piping Size: 76mm (3")
• Tip Finish: Titanium
• Resonator: None (Race spec)