The CP Pistons Bullet Race piston set for Big Block use specifies a 4.605" bore, 4.250" stroke, 6.385" rod and 1.275" pin in a set of eight. Intended for high-displacement V8 assembly, the listing gives precise dimensional data so builders can match pistons to block and rotating assembly requirements without ambiguity.
CP Piston BRS Big Block 4.605 Bore 4.250 Stroke 6.385 Rod 1.275 Set Of 8 (MTO Non-Cancel)