GSC Power-Division Super Alloy STD Exhaust Valves – Set of 12 (Toyota Supra / BMW B58 & S58) – GSC2091-12
The GSC2091-12 Super Alloy Exhaust Valve Set is built for high-output turbocharged applications on Toyota and BMW platforms equipped with B58 and S58 engines. Featuring a standard 28.5mm head diameter, these valves are engineered to withstand extreme exhaust gas temperatures—up to 2000°F—making them ideal for high-horsepower builds and elevated EGT conditions.
Each valve is finished with a chrome-polished stem for enhanced lubricity and long-term durability, especially when paired with GSC’s Manganese bronze valve guides. The under-head dish is optimized for weight reduction, while swirl-polished and backcut heads improve airflow and combustion efficiency without compromising strength.
Whether you're pushing boost on the street or track, GSC’s Super Alloy valves deliver the heat resistance, reliability, and performance your build demands.
Fitment:
- 2016–2025 Toyota Supra 3.0L B58 (A90/A91)
- 2016–2025 BMW 340i / M340i 3.0L B58 (F30/G20)
- 2016–2025 BMW Z4 3.0L B58 (G29)
- 2018–2025 BMW X3 M 3.0L S58 (F97)
- 2018–2025 BMW X4 M 3.0L S58 (F98)
- 2021–2025 BMW M3 3.0L S58 (G80)
- 2021–2025 BMW M4 3.0L S58 (G82/G83)
- 2023–2025 BMW XM 3.0L S58 Hybrid
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
