Part #: 612002C - 4. Manley's forged and dished pistons for the EJ257 are crafted from high - strength 2618 material. They're lightweight but built to last. 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 ensures perfect control of the groove's size, shape, flatness, and finish. Precise pinhole machining guarantees an exact compression distance and accurate lock ring groove spacing. These pistons are available in standard size and a wide range of oversize options, suitable 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 clean and ready for installation. Carefully place the pistons into the cylinders, ensuring they fit properly with the included rings and hardware. When installing, be gentle to avoid any damage to the pistons or other engine parts. As for maintenance, regularly check the pistons for wear and tear. After a long - term use, it's a good idea to have them inspected by a professional. Keep in mind that these pistons are designed for high - performance engines, so make sure your engine can handle the power they provide. Also, always follow the manufacturer's instructions for any engine - related work.
