The CP Pistons Bullet Race Series piston set for big-block applications is offered as a matched eight-piece kit for engine assembly. The source lists a 4.500-inch bore, 4.250-inch stroke and a 6.385-inch rod length, supplied as a set of eight pistons and noted made-to-order non-cancelable in the original description.
CP Piston BRS Big Block 4.500 Bore 4.250 Stroke 6.385 Rod Set Of 8 (MTO Non-Cancel)