CP Piston & Ring Set for Subaru EJ257 WRX/STI (Stroker)-Bore (99.5mm)-Size (STD)-CR (10.0)-Set of 4

CP Pistons is well-known for making strong internal engine components, and this forged piston and ring set is a prime example for your 2004-2012 Subaru Impreza WRX or STI. If you're building a stroker engine or looking to upgrade your EJ257, these pistons are designed to handle the increased demands. They come in a standard bore size of 99.5mm with a 10.0:1 compression ratio, making them a solid choice for performance builds.

Forged from high-strength aluminum, these pistons are built to withstand higher cylinder pressures and temperatures compared to cast pistons. This set includes all four pistons and their corresponding rings, ensuring you have everything needed for a complete engine rebuild. The standard bore size means they're ready to be installed in an engine block machined to that specification, or a block that has been bored out to 99.5mm.