Rocker Arm Kit

Rocker arms are components of an internal combustion engine's valvetrain system. They are typically located between the camshaft and the engine's valve stems and are responsible for transferring the motion of the camshaft to the valves, opening and closing them as required. Rocker arms are typically made of steel and are mounted on pivots that allow them to move up and down in response to the motion of the camshaft. The function of a rocker arm is to help convert the rotational motion of the camshaft into linear motion of the valve stems. As the camshaft rotates, the lobes push against the rocker arms, which in turn push against the valve stems, opening and closing the engine's valves. The shape and placement of the cam lobes on the camshaft determine the timing and duration of the valve opening and closing events. If the rocker arms become worn or damaged, they can cause the valves to open and close improperly, leading to reduced performance, increased emissions, and even engine damage or failure. Upgraded aftermarket rocker arms can also be used to enhance performance and durability, especially in high-performance engines.

When selecting a rocker arm kit, first confirm the year, make, and engine size (for example, when looking for a Jeep 4.0 rocker arm kit). Next, confirm the rocker arm stud size and rocker arm ratio, keeping in mind that a higher ratio will increase valve lift and decrease clearance between the pistons and valves. From the remaining compatible options available, choose the rocker arm set that best fits your application as well as your budget.

JEGS offers a large rocker arm kit selection from top brands such as COMP Cams, Howards Cams, Jesel, Scorpion Racing Products, Speedmaster, and many others. Rocker arm kits provided by JEGS are constructed from high-quality components and assembly to provide long-lasting performance your engine needs.