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The ARP M9 head stud set uses ARP2000 fasteners with M9 x 1.0 and M9 x 1.25 thread options for cylinder head installation. Intended as a direct replacement head stud solution, this ARP offering supplies high-quality threaded hardware for securing head assemblies, giving engine builders a reliable fastening option where correct thread form and strength are essential.
ARP Head Set M9 x 1.0 1.25 - ARP2000 Stud
