GSC (STD) Stopper Exhaust Valve Guide Set of 8 Subaru WRX 15-21 / BRZ 13-20 / FR-S 13-16 | 3105-8 vendor_SubieTrays All-Weather & Spill ResistantWaterproof design

All-Weather & Spill ResistantWaterproof design keeps dirt

5-Axis machined billet impeller and high-diffusion housing developed in our SAE-J1723-compliant supercharger test cell

2009-2018 Nissan GT-R (2015-2018 Excluding Brembo / Stoptech Design)

Part #: NSK1000-SS-O

GSC (STD) Stopper Exhaust Valve Guide Set of 8 Subaru WRX 15-21 / BRZ 13-20 / FR-S 13-16 | 3105-8 vendor_SubieTrays All-Weather & Spill ResistantWaterproof designProduct Fitment: 2013 2016 Scion FR S 2013 2020 Subaru BRZ 2015 2021 Subaru WRX Upgrade your FA20 engines valvetrain reliability and precision with the GSC Power Division Stopper Style Exhaust Valve Guides. Designed for high performance and forced induction applications, these valve guides deliver superior strength and wear resistance compared to factory components. The stopper style design provides enhanced stability for the exhaust valve,