Refined fit for maximum coverage

Two lower waterproof pockets

Breath deflector

Gorgeous bare machined finish

Bel Ray - Thumper Racing Works Synthetic 4T Engine Oil 10W-50 6D Helmets Refined fit for maximum coverageBel Ray Thumper Racing Works Synthetic 4T Engine Oil is a 4 stroke synthetic motorcycle racing oil that has been developed for full works competition use and is designed to withstand extreme racing conditions. Full synthetic ester base oils withstand the highest temperatures and stresses which provide the ultimate 4 stroke motorcycle oil. Meets API SM and JASO MA2 requirements. Suitable for air cooled liquid cooled 4 stroke engines and wet clutches.