ARP Main Bolts/Studs EVO X 4B11T

ARP main stud kits provide numerous benefits, such as preventing main cap walk and fretting, as well as protecting engine block threads. Each kit includes durable parallel-ground washers and high-quality nuts. Some kits also offer options for installing windage trays, with specially designed serrated lock nuts and standoff studs to securely hold the tray in place. The studs themselves are made from 8740 chrome moly steel and are heat-treated in-house to achieve a tensile strength of 190,000 psi. The precision J-form threads are rolled after heat-treatment, resulting in a fastener with threads that are 2000% stronger than others.

Choose between our Two options:

• ARP-207-5201
• ARP-207-5403

ARP-207-5201

The ARP 207-5201 main bolts for 4B11 Evo X are designed with precision and strength in mind. This kit includes 10 M10 bolts and 10 M8 bolts, all featuring 8740 chrome moly steel construction and 190,000 psi tensile strength. The fasteners are heat-treated and have J-form threads that are rolled after heat-treating, resulting in a 1000% stronger thread than other options. As an industry expert, we highly recommend this main bolt set for its superior design and materials.

ARP-207-5403

Use ARP-207-5403 Main Studs for a race-ready engine. Stronger and more durable than stock main bolts, these fasteners are made from ARP2000 alloy, heat treated to 220,000 psi tensile strength. They also feature precision J-form threads for superior strength. Protect your engine from failures caused by stretched fasteners and ensure proper clamping force.

Vehicle Fitment:

Evolution X 2008-2015