Subaru WRX Performance Exhaust - GSC Power Division - +1mm Chrome Polished Valve - `15-`27. Premium +1mm oversize chrome-polished exhaust valves for enthusiasts building the FA20F-powered WRX with an eye toward dependable flow and consistency.

Manufactured by GSC Power Division (PN 23-8N), these 30 mm head exhaust valves are supplied as a matched set of eight for the FA20F platform. The +1mm head diameter increases effective curtain area to support improved exhaust evacuation when paired with proper head work. A chrome-polished finish promotes smoother gas flow, while precision machining and tight tolerances help deliver consistent performance in demanding builds. Professional installation and correct clearances are recommended.

Features

• Application: Subaru WRX FA20F (2015+)
• Head diameter: 30 mm (+1 mm)
• Quantity: Set of 8 exhaust valves
• Finish: Chrome polished
• Manufacturer: GSC Power Division
• Part number: 23-8N

Have questions about fitment or build planning? Call us. We offer expert support plus installation and customization at our Austin, Texas and Los Angeles, California area locations: 512-982-9393 (TX), 562-981-6800 (CA).

Considering multiple items? Contact us for shipping discounts. We install on premises at both locations.

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