Manley STD Stroke 99.55mm +.05mm Bore 8.5:1 Dish Piston and Ring Set Subaru WRX STI EJ257 2004-2021

Part #: 612001C-4. Manley offers forged and dished pistons for the EJ205, crafted 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 groove size, shape, flatness, and finish. Precise pinhole machining results in an accurate compression distance and exact lock ring groove spacing, size, and concentricity. Manley pistons are available in standard size and a wide range of oversize/overbore options for high-performance engine builds.

Using this Manley piston and ring set is straightforward. First, make sure your engine is properly prepared and clean before installation. Carefully follow the instructions provided with the set. When installing the pistons, be gentle to avoid any damage. The included round wire locks, tool steel wrist pins, and piston rings are there to enhance performance, so ensure they are installed correctly. As for maintenance, regularly check your engine oil and coolant levels. If you notice any unusual noises or performance issues, it's a good idea to have your engine inspected. Also, avoid over - revving the engine to keep the pistons in good condition. This set is designed for high - performance engines, so it can handle a lot, but proper care will ensure it lasts a long time.