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Kit comes complete with studs, hardened parallel ground washers, nuts, and ARP torque lube.
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 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.
Applications: Toyota 1NZFE 1.5L 4-cylinder DOHC