ARP 203-5001 Main Bolt Kit for TOYOTA 1600cc ymm_22 Precision CNC-machined to exacting specifications

Precision CNC-machined to exacting specifications

reinforcing its exclusive design and motorsport character

Adjustable acoustic reflector

which perfectly combines with the deep sound in the lower range to provide an aural experience in the cabin with no drone and a sound that lingers long after the throttle is released

High-temperature resistant material ensures durability under extreme conditions

ARP 203-5001 Main Bolt Kit for TOYOTA 1600cc ymm_22 Precision CNC-machined to exacting specificationsFar superior to any other main bolt kit offered 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, all bolts feature generous under head radius and rolled threads for the utmost reliability. The threads are rolled after heat treating, which makes them about 1000% longer fatigue life than most main bolts, which are threaded prior to heat