This CP Piston & Ring single piston covers Acura/Honda K20A (9.25:1 CR) and K24A (10.5:1 CR) applications, heavy-duty spec, with an 87.5mm bore in standard size. The listing specifies the compression ratios and bore size for builders replacing or specifying individual pistons in those K-series engine applications.
CP Piston & Ring Acura/Honda K20A 9.25:1 CR / K24A 10.5:1 CR Heavy Duty - Bore (87.5mm) - Size (STD)