The Great American Valvetrain Company. Jesel is a premium valvetrain parts manufacturer specializing in Rocker Arms, Roller Lifters, Belt Drives, OHC Followers and more.

Jesel camshaft belt drives provide superior accuracy in cam timing, reduced vibrations, and extended engine life. They are designed for high-performance racing applications, offering …

Engine builders and racers alike have experienced years of dependable, maintenance free performance with Jesel Sportsman Aluminum Series Shaft Rockers. Their robust design …

Driven by Innovation Since 1980, Jesel has been the driving force behind groundbreaking advancements in valvetrain technology.

Jesel Tech Tips, Frequently Asked Questions, Installation Instructions, Rocker Arm Geometry and Rocker Code Chart.

Choose Jesel Pro Series shaft rockers to elevate your race engine's performance to championship levels. Explore the possibilities and customize your components to suit your …

Jesel offers a wide variety of Tools and Accessories. Everything from Spring Removal Tools, to Valve Lash Adjusters and Rocker Length Gauges.

By machining the head in house, Jesel can custom fit a longer pivot rocker to clear the spring while adding multiple mounting points to firmly secure the valvetrain.

Jesel now manufactures five different styles of roller lifters in various sizes: Keyway, Dog-Bone, Tie-Bar, Sportsman Solid Body, and the latest wheel-guided Cartridge Roller Lifters.

Explore Jesel Pro Steel Shaft Rockers, engineered for unmatched durability. Ideal for high-pressure engines in racing applications like NHRA Pro Mod and endurance events. …