GSC Power Division Viton Valve Stem Seals for BMW M240 (G42) M340 (G20) & Toyota Supra MKV (A90) B58 B58B30C Engines

GSC Power-Division Viton® Valve Stem Seals use genuine DuPont Viton® fluoroelastomer material. Viton® was specifically developed for the extreme conditions seen in today’s high horsepower, Turbo engines. Held to a higher standard, GSC Power-Division Viton® valve seals provide improved resistance to high temperatures, fuel, and chemical contaminants as well as extended wear as seen in high rpm or high mileage engines. GSC Power-Division doesn’t believe in cutting corners, that’s why the Viton® valve seal kits are used on both the intake and exhaust valve seals. All of this performance for a fraction of OEM dealership parts, GSC’s Viton® valve seals are perfect for all situations.

• Toyota Supra B58 Valve Stem Seals
• BMW Z4 B58 Valve Stem Seals
• BMW S58 Valve Stem Seals

Sold as a set of 12 Intake, 12 exhaust or a full set of 24, 5mm stem seals.