The CP Pistons Bullet Race piston set for BBC applications lists a 4.605" bore, 4.250" stroke and 6.535" rod length and is sold as a complete set of eight. This Bullet Race set provides the precise dimensional match needed for certain big-block Chevy applications and is produced per the specified measurements in the listing.
CP Piston BRS BBC 4.605 Bore 4.250 Stroke 6.535 Rod Set Of 8 (MTO Non-Cancel)