This CP Piston and ring set is specified for the Mitsubishi 4B11 from the Evo X, with a 89.5mm bore and +4.0mm oversize listed and supplied as a set of four. The description identifies the 4B11 Evo X application and provides the bore sizing and oversize specification for accurate matching in engine rebuilds or repairs requiring those exact dimensions.
CP Piston & Ring Set for Mitsubishi 4B11 Evo X - Bore (89.5mm) - Size (+4.0mm) - CR (8.8) - Set of 4