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The ARP main bolt kit is specified for big-block Chevrolet WP Merlin II and III iron blocks, providing the main bolts needed to secure the crank to the iron block. This kit supports engine rebuilds or main fastener replacement on compatible Merlin II/III big‑block Chevy applications, offering a source‑faithful replacement set sized for the original block configuration and service needs.
ARP BB Chevy WP Merlin II and III Iron Block Main Bolt Kit
