GSC Viton Valve Stem Seals for Subaru FA/FB Engines – GSC1023
High-Temp Upgrade for Subaru FA & FB Platforms
The GSC1023 Valve Stem Seal Set is a premium upgrade for Subaru FA and FB engines, including FA20 and FB20/25 variants. Made from heat-resistant Viton material, these seals outperform standard OEM rubber — especially in high-performance applications where elevated temperatures are common.
Product Highlights
- Viton construction for superior heat and chemical resistance
- 6mm seal size compatible with FA and FB series cylinder heads
- Sold as a complete set of 16 valve stem seals
- Ideal for turbocharged and naturally aspirated Subaru builds
Engine Compatibility
Designed to fit a wide range of Subaru models equipped with FA2* and FB2* engines. Whether you're building for street, track, or reliability, these seals deliver OEM fitment with performance-grade durability.
Fitment:
- 2005–2024 Subaru Outback
- 2009–2024 Subaru Legacy
- 2011–2024 Subaru Forester
- 2012–2024 Subaru Impreza
- 2013–2024 Subaru Crosstrek
- 2013–2024 Subaru BRZ
- 2015–2024 Subaru WRX
- 2012–2016 Scion FR-S
- 2021–2024 Toyota GR86
Upgrade your Subaru’s valvetrain with GSC’s Viton seals — engineered for reliability under heat and pressure.
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