Molnar 4340 Forged Crankshaft, 4.250" Stroke, 3.00" main, 326/350/389/400 Block, 2.200" BBC RJ

4340 forged premium steel construction
Nitrided main and rod journal surfaces for superior wear resistance
Multi stage heat treatment
Precision machined to extremely tight tolerances
Material properties are monitored closely to insure optimum performance
Counterweight placement designed for improved crankshaft performance
.125" radius on both the connecting rod and main journals for increased strength
Precision ground and micro-polished journals
Chamfered oil holes for improved oiling
Indexed for correct stroke

Molnar 4340 forged crankshafts are heat treated to increase tensile strength, shot peened to increase fatigue life, nitrided for wear resistance and 100% mag particle inspected to ensure against cracks.

Sizes are held to the tightest tolerances you’ll find in the racing industry!

401-4250RC6F 400 Pontiac w/ 2.200" Rod Pins 4.250 400 2.200 6.535 2150 1114.18