ARP Main Stud Kit for Toyota 2RZ 3RZ Tacoma (Custom Set)

IMPORTANT: Main studs hold the main bearing caps on the bottom of the crankshaft. NOT to be confused with head studs, which hold the head down to the engine block.
ARP main studs eliminate main cap walk, as well as protect the threads of the block. ARP recommends to use main studs over main bolts whenever possible. This is because of the studs ability to provide a more accurate torque reading because studs don't twist in the block as they are torqued down. All clamping forces are on one axis. There is also less force exerted on the block threads, which improves the engine block's life. Finally, studs allow for proper alignment of the main caps and easier engine assembly.

Kit comes with (10) head studs, (10) parallel ground washers, and (10) 12-point nuts needed for a direct bolt on, as well as the ARP moly-lube and instruction sheet.

The studs are manufactured from 8740 chrome moly steel, heat-treated to 200,000 PSI tensile strength, and precision J-form threads rolled after heat-treat to create a fastener that has threads 2000% stronger than others.

ARP recommends studs are over bolts because of the ability to obtain a more accurate torque reading studs provide over bolts. Studs don't twist as they are fastened down. Additionally, because of this there is less force exerted on the thread of the block, which results in increased block life, especially on aluminum blocks.

ARP studs are made from premium 8740 alloy, rated far superior to aircraft quality materials. Each set is heat treated to 200,000 psi, thread Rolled after heat treating, which results in a stud 1000% better than studs that are thread rolled prior to being heat treated. The kit includes 12-point nuts and hardened parallel ground washers. Using studs will make it much easier to assemble an engine. Studs provide more accurate and consistent torque loading. When you use bolts, the fastener is actually being twisted as torque is being applied to the it. The bolt is thus reacting to two different forces simultaneously.

Applications: Toyota 2RZ 3RZ engines Toyota Tacoma