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Return to Parts List Category : D- Big Block (Low Deck) : Fasteners ARP 145-4007 BB HEAD STUDS KOFFEL/BRODIX B-1, MO/MC HEX NUTS $221.99 ARP Brand, 190,000 Psi Tensile Strength Fits all bog blocks except Hemi. 12-Point Head, Mopar, B/RB/413-426 Wedge, Cylinder Head Studs Kit These Pro series studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining and are rated at a whopping 190,000 psi. The Pro series kits are also available with 12-point nuts, and all kits come complete with hardened parallel washers for an even load distribution and accurate torque readings.