GSC Power-Division Viton Valve Stem Seals-5.5mm (gsc1041) 17260 delivering a smoother high-rev sound

delivering a smoother high-rev sound characteristic of performance BMW M cars

water/meth

they are heat-treated

Clears OEM Crash Bar

thus removing the unwanted restriction in flow while facilitating impressive gains across the entire powerband

GSC Power-Division Viton Valve Stem Seals-5.5mm (gsc1041) 17260 delivering a smoother high-rev soundGSC Power Division Viton Valve Stem Seals for Honda B18 21, D16, H23 Engines with 6. 6mm valve size seal set. These are an upgrade from the standard OEM material to help cope with the higher heat caused by high performance engines. Sold as a set of 16 Features: Designed to deliver trouble free, consistent performance Right for your vehicle and lifestyle Made from high quality materials for ultimate durability Manufactured to meet or exceed strict