The Subaru / Robin 263-23422-J3 Piston supports the conversion of combustion energy into mechanical movement within compatible engines. The piston moves back and forth inside the cylinder, transferring force through the connecting rod to turn the crankshaft during engine operation. Designed for compatible Subaru and Robin engines, this replacement piston can be used when the original ... https://www.wholetoolbox.com/subaru-robin-263-23422-j3-piston/263-23422-J3.html