JE Pistons and Rings 99.5 Bore 83mm Stroke 8.5:1 Comp Subaru WRX / STI EJ257 2004-2021

Part #: 291063. JE piston and ring designs are tailor - made for extreme applications, even professional competitions in your Subaru WRX and STI. In high - demand scenarios like high compression ratios, heavy boost, or intense nitrous use, the 2618 aluminum alloy with high tensile strength is a must. Fitment: Ideal for SUBARU 2004+ IMPREZA STI, 2005+ FORESTER XT, LEGACY GT, and 2006+ WRX EJ257. Key features include 2618 T6 high - tensile forged aluminum, smooth - flowing radii on dome and dishes for great flame travel, 1.2 x 1.2 x 2.5mm ring widths, a.905 x 2.500 straight - wall carbon steel wrist pin, pin fitting and wire locks, and a set of 4 pistons and 4 rings.

Using these JE pistons and rings is straightforward. First, make sure your engine is clean and ready for installation. Carefully place the pistons in the cylinders, using the provided wrist pin and wire locks. When installing the rings, be gentle to avoid any damage. As for maintenance, it's important to regularly check the engine oil level and quality. Make sure the oil is clean and at the right level to keep the pistons and rings lubricated. Also, after long - term use or high - performance driving, it's a good idea to inspect the pistons and rings for any signs of wear. If you notice any abnormal noises or a drop in engine performance, have the pistons and rings checked by a professional. Remember to always follow the manufacturer's instructions for your Subaru WRX or STI when using these parts.