ARP 145-5201 Main Bolt Kit for Mopar 426 Hemi ymm_71 and assures optimum engine sealing

and assures optimum engine sealing

heat-treated in-house to 200

safe and powerful tune

the Sound Kit offers versatility in sound management with factory-level integration

Flange Inside Diameter: 2

ARP 145-5201 Main Bolt Kit for Mopar 426 Hemi ymm_71 and assures optimum engine sealing2 Bolt Main Bolt Kit by ARP. Far superior to any other main bolts available for use in competition engines, ARP main bolts are designed to meet the exacting standards and demands of professional engine builders. Forged from 8740 chrome moly steel, all ARP main bolts feature a reduced wrenching head, large underhead radius and rolled threads for the utmost in reliability. The threads are rolled after heat treating which gives them about 2000% better