
The CP piston and ring set is made for Honda B‑series engines with an 85.0mm bore and +1.0mm oversize specification, yielding a 12.5:1 compression ratio as listed. This single description identifies bore, size and compression so builders can match the set to a B‑series rebuild that requires a 85mm bore plus 1.0mm and a 12.5:1 compression configuration.
CP Piston & Ring Set for Honda B-Series - Bore (85mm) - Size (+1.0mm) - Compression Ratio (12.5)