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This ARP main stud kit is specified for BMC B-Series 3-main installations and supplies high-strength studs intended to replace factory main bolts or studs during engine builds or rebuilds. ARP's hardware is used to secure mains with improved clamp properties over stock fasteners, supporting consistent bearing clearances and torque retention in B-Series applications where durable, repeatable main retention is required.
ARP BMC B-Series 3-Main - Main Stud Kit
