Part #: 612002C - 4. Manley's forged and dished pistons for the EJ257 are crafted from high - strength 2618 material. They're lightweight but tough, promising a long service life. Each 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 gives 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 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.
These Manley pistons are great for your Subaru WRX or STI engine. When installing, make sure to handle them carefully as they're made of high - strength material but can still be damaged if dropped. Check all the included parts like the round wire locks, tool steel wrist pins, and piston rings to ensure they're in good condition. For maintenance, regularly check the pistons for any signs of wear and tear. If you notice any unusual noise or a drop in engine performance, it might be time to inspect the pistons. Keep the engine clean and use high - quality oil to extend the life of the pistons. Remember, these pistons come in a set of four, so if you need to replace one, it's best to replace the whole set for optimal performance.
