The CP Pistons Bullet Race (BRS) piston set for Olds 350 is supplied as a matched set of eight pistons with explicit sizing. The listing shows a 4.065" bore, 3.380" stroke and 6.000" rod length, offered as an MTO non-cancel set of eight. It’s intended for Oldsmobile 350 builds that need those specific bore and stroke dimensions.
CP Piston BRS Olds 350 4.065 Bore 3.380 Stroke 6.000 Rod Set Of 8 (MTO Non-Cancel)