TOMEI MAIN STUDS SET For TOYOTA 4AG 193072Brand TOMEI Product Number 193072 Compatible Car TOYOTA Compatible Engine 4AG Product Description A common weak point found when tuning the 4AG engine is from the crank cab bolts being insufficient to cope with the high stress loads from extreme engine speeds. The weak crank cab bolts can result in the stock crank cab bolts breaking or excessive loads on the bearings causing rapid irregular wearing. In the worse case scenario this can lead to engine