Jesel Accessory Drive Belt System Components

Jesel: America's Premier Valvetrain Innovator

Founded in 1980 and headquartered in Lakewood, New Jersey, Jesel has spent more than four decades earning its reputation as the foremost American manufacturer of high-performance valvetrain components. Whether the destination is a NASCAR superspeedway, an NHRA drag strip, or a circle track Saturday night special, Jesel's precision-engineered parts have become the benchmark by which all other valvetrain hardware is judged.

A Legacy Built on Belt Drives

Few innovations have reshaped the performance engine world quite like the Jesel camshaft belt drive system. In 1982, Dan Jesel invented the small block Chevrolet camshaft belt drive with the singular goal of creating the most accurate and durable cam timing system available — and that goal has never wavered. Available in over 65 styles and applications, Jesel's serpentine belt drive systems use a patented Gates High Torq Drive™ reinforced belt spinning dry between a heat-treated steel crank pulley and a hard-coated billet aluminum upper pulley. The result is superior harmonic damping, reduced friction, and cam timing that can be externally adjusted ±10° without pulling the front cover — a game-changer in race engine serviceability.

Shaft Rockers and Rocker Hardware Built for High RPM

Jesel's engine rocker arms represent decades of engineering refinement and an uncompromising commitment to valvetrain stability. Manufactured from aerospace-grade alloys using state-of-the-art CNC machining centers, Jesel shaft rocker systems are engineered to maintain precise valve geometry and minimize deflection even as spring pressures and engine speeds climb into extreme territory. Complementing these assemblies, Jesel also produces precision engine rocker arm spacers — the often-overlooked hardware that ensures correct rocker geometry, consistent lash settings, and long-term durability in both shaft-mount and stud-mount configurations.

Complete Valvetrain Ecosystem

What sets Jesel apart from many competitors is their commitment to engineering every component of the valvetrain as part of a unified, optimized system. The belt drive kits, for example, are supplied with premium-grade hardware bolts and precision sealing components, including engine crankshaft plugs and Teflon®-coated vacuum seals designed to maintain the extreme crankcase vacuum levels found in modern race engines. Every element is tested and inspected to Jesel's rigorous quality standards before it leaves the Lakewood facility.

Made in the USA, Trusted on Race Day

All Jesel products are designed, machined, and assembled in the United States. The brand's patented roller lifters feature high-strength tool steel bodies, precision-ground rollers, and advanced oiling technology to endure the harshest engine environments. From weekend racers to full-time professional teams competing in NHRA, NASCAR, SCCA, and ARCA, Jesel valvetrain components are the choice of builders who refuse to compromise on precision, strength, or reliability. For engine builders who need the best, Jesel remains — quite simply — the Great American Valvetrain Company.