Milodon Main Caps are CNC machined from high strength ductile material. Side bolts are angled for much added strength. All neccesary bolts, washers and the drill bushings are included in the center three cap kits.
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Alternative Parts
Howards Crankshaft Main Cap H400; Extreme Billet 2 Bolt to 4 Bolt 1020 Billet Steel for Chevy 400