High-performance ARP Main Studs are rated to 200,000 psi for exceptional strength in the most demanding applications. Changing from main bolts to main studs allows more accurate torque readings. None of the torque is "used up" in twisting the bolt, so you get more consistent clamping force and more predictable bearing crush. This kit includes a full set of 10 main bearing studs; matching nuts; hardened, parallel-ground washers; and a packet of ARP assembly lubricant. Fits 2.0L Ford Zetec engines manufactured prior to 1998.