The CP Pistons Bullet Race (BRS) piston set for Chevy LS lists matched internal dimensions and is supplied as a full set of eight. The specification shows an LS bore of 4.065" with a 4.000" stroke and 6.125" rod length. This MTO non-cancel matched kit is meant for LS-based engine assemblies that call for those precise measurements.
CP Piston BRS Chevy LS Bore 4.065 Stroke 4.000 Rod 6.125 Set Of 8 (MTO Non-Cancel)