Part #: 612002C - 4. Manley offers high - performance forged and dished pistons for the EJ257 engine. Made from high - strength 2618 material, these pistons are lightweight but durable, ensuring a long service life. Every set comes with round wire locks, tool steel wrist pins, and piston rings at no extra cost. A special multi - step top ring groove machining process guarantees the best control of the groove's size, shape, flatness, and finish. Precise pinhole machining results in an exact compression distance and accurate lock ring groove spacing, size, and concentricity. Available in standard size and a wide range of oversize/overbore options, they're perfect for any high - performance engine build. Note: All Manley pistons include a full set of four pistons, piston rings, and hardware. Specs: Bore 99.75mm (+.25mm), Comp Distance 1.209', Comp Ratio 8.5:1, Cylinder Head 51cc, Dome Volume - 22cc, Piston Type Dish, Rod Length 5.141'mm, Stroke 79mm, Weight 422g.
Using these Manley pistons is straightforward. First, make sure your engine is properly prepared before installation. Carefully follow the manufacturer's instructions for fitting the pistons, rings, and hardware. When installing, be gentle to avoid any damage. As for maintenance, regularly check the pistons for wear and tear. If you notice any abnormal noises or a drop in engine performance, it might be time to inspect the pistons. Keep the engine clean and use high - quality lubricants to extend the pistons' lifespan. Remember, all Manley pistons come as a set of four with piston rings and hardware included, so you have everything you need for a proper installation.
