This CP single piston is sized for the 4G63 2G bore (86.0mm) at +1.0 oversize and is offered as an individual replacement piston for compatible engines. The listing references fitment and compression cues tied to certain Eclipse and Evo 8/9 configurations in the source; it’s intended to match the listed bore and specification for Mitsubishi 4G63 engine applications where that sizing is required.
CP Piston & Ring for 4G63 2G-Bore (86.0rmm)-Size (+1.0)-CR (8.5 Eclipse / 9.0 Evo 8/9)-SINGLE PISTON