Manley Subaru EJ257 100.25mm Bore +.75mm Over Size Bore 8.5:1 CR Dish Piston Set with Rings

If you're rebuilding the engine in your Subaru EJ257, this Manley Performance Piston Set is a solid choice for serious builds. These pistons are specifically sized at 100.25mm, which is a +.75mm overbore from the stock dimension, and feature a dish design to achieve an 8.5:1 compression ratio. This setup is ideal for turbocharged applications where you need a bit more room for boost and a more controlled burn.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their strength and ability to handle high performance demands. They also come with premium chrome moly wrist pins for added durability. The pistons feature proven cam and barrel skirt profiles designed to generate power while being gentle on your cylinder walls, and the ring lands and grooves are machined to strict standards to ensure a good seal and maximize power output. Manley's unique manufacturing process machines the skirt and ring grooves in one operation, which helps ensure the ring grooves are perfectly square to the piston skirt for optimal performance.

This set includes the pistons, wrist pins, and rings needed to get your EJ257 engine back in action. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For optimal results, always refer to the manufacturer's installation instructions and recommended assembly procedures.