Break the chain with built-to-last, built-to-win Jesel 2-piece upper pulley belt drive systems. Jesel’s 2 piece Belt Drive Timing Systems are designed for Mark IV Big Block Chevy applications. These often-duplicated, but never-matched systems are the most accurate and durable cam timing systems available. They are built with the finest materials and coatings, and then precision CNC-machined to go the distance in any race and still be ready for more. These 2-piece camshaft belt drives are infinitely adjustable and track-proven to outlast chain drives, plus reduce the amount of harmonics being transferred to the camshaft. Jesel designs components not just to survive, but to thrive. So go racing with great American know-how–Jesel camshaft belt drive systems.
* 2024-T6 billet aluminum Spider
* Heat-treated steel crank pulley
* PTFE coated high-vacuum cam and crank seals
* Grade 8 hardware
* Patented HTD reinforced belt
* Easy, accurate external cam timing adjustment