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Return to Parts List Category : D- Big Block (Low Deck) : Fasteners : Cylinder Head : Studs ARP 145-4006 BB HEAD STUD KIT OEM OR EDEL RPM HEX NUTS $199.34 ARP Brand, 190,000 Psi Tensile Strength Fits all big blocks except Hemi. 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.