ARP Main Bolt Kit - Toyota 4UGSE 2.0L - 203-5002 8100 Series 91% weight and TBN: 8

91% weight and TBN: 8

and 25% greater internal volume

We use a true beam design all the way through the length of the stud (it's not necked-down or undercut like others) resulting in better clamping force and torque values

ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load

ARP Main Bolt Kit - Toyota 4UGSE 2.0L - 203-5002 8100 Series 91% weight and TBN: 8Far 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 fatigue strength than most main