ARP Main Stud Kit 2-Bolt 12pt For 07-13 Mazda Mazdaspeed 3 & 6 DOHC 2.3L

Ensure maximum bottom-end durability with the ARP Main Stud Kit, crafted from premium 8740 chrome moly steel. Heat-treated to a tensile strength of 200,000 psi, these studs eliminate main cap walk and fretting under high loads. Precision J-form threads rolled after heat treatment deliver unbeatable fatigue strength and thread integrity. Each kit includes hardened parallel-ground washers and high-strength 12-point nuts for consistent and even clamping force. Trusted by top engine builders, ARP main studs are a must for any performance engine build.

ARP Main Stud Kits are engineered for superior engine reliability under extreme conditions. These fasteners offer a major upgrade over OEM bolts by reducing crankshaft flex and helping maintain precise bearing alignment. Whether you're racing or building a high-powered street engine, ARP’s advanced metallurgy and manufacturing deliver unmatched strength and long-term performance. With simple installation and provisions for windage trays in some kits, ARP studs provide a critical foundation for your rotating assembly.

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