A single CP piston for Honda B20 used with a B16 head, bore 84mm, standard size. The piston specification lists a bore of 84mm, standard sizing, and yields a compression ratio of 10.2 when matched as described. This single piston is intended for engine builds that follow the stated B20 with B16 head combination and the quoted dimensions.
CP Piston & Ring Honda B20 w/B16 Head - Bore (84mm) - Size (STD) - Comp Ratio (10.2)