This CP single piston is specified for Honda B-series engines with an 81.5mm bore at +0.5mm oversize and a 10.5 compression ratio. Sold as a single replacement piston and ring set entry, it is intended for engine rebuilds where an oversized piston and matching ring set are required to restore proper clearances and compression for the B-series application listed in the product description.
CP Piston & Ring Honda B-Series - Bore (81.5mm) - Size (+0.5mm) - CR (10.5) (Single Piston)