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Bel-Ray Thumper 4-Stroke Racing Motor Oil is specifically engineered to meet the demands of single cylinder, multi-valve 4-stroke racing engines. The high temperatures and severe loads of racing require the exceptional film strength, shear- and temperature stability of Bel-Ray Thumper 4-Stroke Racing Motor Oil. Synthetic blend for racing engines Maximum horsepower and consistent clutch performance Wear protection for valve-trains, rings, cylinders and pistons For air-cooled / liquid-cooled 4T engines with wet clutches.
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An innovative entrepreneur and chemical engineer, William (Bill) Kiefer started the company in his family’s suburban New Jersey (USA) garage, specializing in high temperature bakery lubricants. Bel-Ray’s first product was a specialty lubricant manufactured for Nabisco for use in high-temperature bakery ovens. This launched the company’s Industrial Division. The company’s goal: to provide industrial customers with new, inventive products that offered optimum performance and measurable value.