GSC Power-Division Intake Viton® Valve Stem Seal Kit – GSC1090 (BMW/Toyota B58 & S58 Engines)
The GSC1090 Intake Valve Stem Seal Kit is built for BMW and Toyota platforms running B58 and S58 engines. Manufactured using genuine DuPont Viton® fluoroelastomer, these seals are engineered to perform under the extreme conditions found in high-horsepower, turbocharged builds.
Viton® material offers superior resistance to elevated temperatures, fuel exposure, and chemical breakdown—making it ideal for engines operating at high RPM or extended mileage. GSC Power-Division applies the same high standards to both intake and exhaust valve seals, ensuring durability and performance across the board.
Applications Include:
- Toyota Supra B58
- BMW Z4 B58
- BMW S55
- BMW S58
Kit Contents:
- Set of 12 Intake Valve Stem Seals (5mm stem diameter)
Whether you're building for the street or the strip, GSC’s Viton® seals deliver premium performance at a fraction of OEM pricing.
Fitment:
- 2016–2025 Toyota Supra 3.0L B58
- 2016–2025 BMW 340i / M340i 3.0L B58 (G20, F30)
- 2016–2025 BMW Z4 3.0L B58 (G29)
- 2015–2020 BMW M2 Competition 3.0L S55
- 2015–2020 BMW M3 3.0L S55 (F80)
- 2015–2020 BMW M4 3.0L S55 (F82/F83)
- 2020–2025 BMW M3 3.0L S58 (G80)
- 2020–2025 BMW M4 3.0L S58 (G82/G83)
- 2023–2025 BMW XM 3.0L S58 Hybrid
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