Crankshaft

Shown here is our 3.75" stroke crankshaft for "RB" (413/426/440) engines. This crank is popular for those looking for a replacement type crank with stock "factory" specs, yet still having the strength to withstand 1000+ horsepower. Crank includes the following specs: Stroke: 3.750" / Block Type: RB / Main Journal Diameter: 2.750" / Rod Journal Diameter: 2.375" / Rod Journal Width: 2.050" / Counterweight Diameter: 7.480" / Flange Bolts: 6 x 7/16".