GSC +1mm Oversized Exhaust Valve Set FA20F WRX (GSC2283-8)
Oversized Performance Exhaust Valves for 20152024 Subaru WRX FA20F
Built for the 2015+ Subaru WRX FA20F, the GSC Power-Division +1mm Exhaust Valve Set delivers increased flow, durability, and precision fitment. This set of 8 valves features a 30mm head diameter1mm larger than stockand optimized stem geometry, ideal for high-RPM, high-boost applications.
Technical Specifications
- Part Number: GSC2283-8
- Head Diameter: 30.00mm (1.181")
- Stem Diameter: 5.5mm (0.215")
- Overall Length: 97.90mm (3.854")
Designed for Flow, Strength, and Reliability
Using advanced 3D simulation and design software, GSC developed a reinforced valve head with superior flow characteristics. Each prototype is tested in its intended engine platform to ensure maximum performance. Reduced face distortion improves sealing under extreme conditions, resulting in consistent output and extended valve life.
Key Features:
- Swirl-polished heads enhance exhaust flow and valve aerodynamics
- Backcut design reduces weight for improved RPM capability
- Micro-polished stems minimize oil drag and improve guide movement
- Made from modified 23-8n stainless steel for heat resistance and durability
- Stellite-tipped or hardened valve ends for extended wear protection
- 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
Application: Designed specifically for 20152024 Subaru WRX FA20F engines. Please confirm fitment before ordering.
Fitment:
- 2015 Subaru WRX FA20F
- 2016 Subaru WRX FA20F
- 2017 Subaru WRX FA20F
- 2018 Subaru WRX FA20F
- 2019 Subaru WRX FA20F
- 2020 Subaru WRX FA20F
- 2021 Subaru WRX FA20F
- 2022 Subaru WRX FA20F
- 2023 Subaru WRX FA20F
- 2024 Subaru WRX FA20F
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
