GSC Power Division Viton Valve Stem Seals for BMW M240 (G42) M340 (G20) & Toyota Supra MKV (A90) B58 B58B30C Engines Select Valve Stem Seals:Exhaust Set (12) lower pressure drop across the

lower pressure drop across the system

increased frictions

- Required Wiring

Specs: Made of a Velveteen interior material and Polyester exterior material

improves turbo response

GSC Power Division Viton Valve Stem Seals for BMW M240 (G42) M340 (G20) & Toyota Supra MKV (A90) B58 B58B30C Engines Select Valve Stem Seals:Exhaust Set (12) lower pressure drop across theGSC Power Division Beehive Valve Springs & Titanium Retainers Fitment: All BMW M240 (G42) M340 (G20) & Toyota Supra MKV (A90) Gen 2 B58 B58B30C Engines GSC1089 GSC1090 GSC Power Division Viton Valve Stem Seals use genuine DuPont Viton fluoroelastomer material. Viton was specifically developed for the extreme conditions seen in todays high horsepower, Turbo engines. Held to a higher standard, GSC Power Division Viton valve seals provide improved