JE Pistons and Rings 99.5 Bore 8.5:1 Comp Subaru WRX / STI EJ257 Block W/ EJ20 Head 2004-2021

Part #: 291059. JE presents top - notch pistons and rings for your Subaru WRX. These are designed for the SUBARU EJ257 BLOCK with an EJ20 HEAD. The new 'FSR' high - strength forging design combines strength and lightness. Extensive on - track testing guarantees flawless performance under tough conditions. Key features include 2618 T6 high - tensile forged aluminum, engineered for high - horsepower Subaru engines. The dome and dishes have smooth radii for great flame travel. Ring widths are 1.2 x 1.2 x 2.5mm. A.905 x 2.500 straight - wall carbon steel wrist pin is provided. Pin fitting, Tru Arc locks, and JE Pro Seal Rings are all included. You'll get 4 pistons and 4 rings in the set.

Using these JE pistons and rings is straightforward. First, make sure your engine is clean and free of any debris. Carefully install the pistons and rings following the standard engine assembly procedures. When installing the rings, be gentle to avoid any damage. As for maintenance, regularly check the pistons and rings for wear and tear. After long - term use or high - performance driving, it's a good idea to have them inspected by a professional. Always use high - quality engine oil to keep them lubricated. If you notice any unusual noises or a drop in engine performance, stop using the vehicle and have the pistons and rings checked right away.