Fresh from ARP are two new head stud kits for BBC AFR 18-degree applications: one hex (135-4008) and one 12 point (135-4305). Manufactured with premium 8740 chrome-moly material, these kits are centerless ground, heat treated before thread rolling/machining, and nominally rated at 190K PSI tensile strength. Included in every kit is a 0.5-ounce pack of […]
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