ARP 145-5201 Main Bolt Kit for Mopar 426 Hemi ymm_1 they deliver the ultimate in

they deliver the ultimate in performance and dependability

The system is split in 2 codes only because of packaging reasons

100˝ Knurl Length 1

000˝ Grip Length n/a˝ Thread Diameter-Pitch 5/16-18 Grip Diameter 5/16˝ Wrenching 3/8˝ Head Height 0

The sound has been tuned to deliver a fulfilling acoustic statement every time the car fires to life

ARP 145-5201 Main Bolt Kit for Mopar 426 Hemi ymm_1 they deliver the ultimate in2 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