GSC +1mm Exhaust Valve Set – FA20 BRZ/FRS/86 (GSC2133-8)
Oversized Exhaust Valves for FA20 Performance Builds
Designed for the 2014–2021 Subaru BRZ, Scion FR-S, and Toyota 86, the GSC Power-Division +1mm Exhaust Valve Set delivers enhanced flow and long-term durability. With a 30mm head and precision-machined stem, this set of 8 valves is built to handle high RPM, elevated boost, and aggressive cam profiles.
Technical Specifications
- Part Number: GSC2133-8
- Head Diameter: 30.00mm
- Stem Diameter: 5.5mm
- Overall Length: 97.60mm
Engineered for Strength, Flow, and Longevity
Developed using advanced 3D modeling and simulation software, GSC’s exhaust valves feature a reinforced head profile and optimized flow dynamics. Prototype testing ensures maximum airflow in FA20 applications, while reduced face distortion improves sealing under extreme conditions for consistent performance over time.
Key Features:
- Swirl-polished heads for smoother exhaust flow
- Backcut design reduces weight for higher RPM and boost
- Micro-polished stems minimize oil drag and improve motion
- Made from modified 23-8n stainless for heat resistance and longevity
- Hardened or stelite-tipped valve ends for reduced wear
- Optimized tip height for better geometry and faster lash setup
- Balanced keeper groove to reduce spring shims and maximize kit performance
- Compatible with OEM or upgraded keepers/locks (reuse not recommended for performance builds)
Fitment Note
SPECIAL NOTE: This valve set is designed for 2014 and newer FA20 engines only. Please verify compatibility before ordering.
Fitment:
- 2014 Subaru BRZ 2.0L FA20
- 2015 Subaru BRZ 2.0L FA20
- 2016 Subaru BRZ 2.0L FA20
- 2017 Subaru BRZ 2.0L FA20
- 2018 Subaru BRZ 2.0L FA20
- 2019 Subaru BRZ 2.0L FA20
- 2020 Subaru BRZ 2.0L FA20
- 2021 Subaru BRZ 2.0L FA20
- 2014 Scion FR-S 2.0L FA20
- 2015 Scion FR-S 2.0L FA20
- 2016 Scion FR-S 2.0L FA20
- 2017 Toyota 86 2.0L FA20
- 2018 Toyota 86 2.0L FA20
- 2019 Toyota 86 2.0L FA20
- 2020 Toyota 86 2.0L FA20
- 2021 Toyota 86 2.0L FA20
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
