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These comprehensive drive systems are designed to provide contemporary competition engine builders with the most accurate valvetrain components available today. These belt drive systems absorb significant amounts of crank-cam harmonics as well as taking less power to drive. The belt durability has proven to be greater than both gear drives and chain drives over thousands of race miles of competition in all types of race car applications. Removable thrust plate is also adjustable allowing easy end play adjustment as well as cam removal through cover.