1989-1998 Dodge Cummins 5.9L 12 Valve ARP 12mm Headstud Kit - 247-4203ARP Head Stud Bolt Kits Are built with quality and longevity in mind. There are no shortcuts to a quality product, and ARP definitely takes pride in their work and their product. There's a reason the top mechanics and Truck Builders rely on ARP. Each and every Stud is placed on a rack and heat treated to 200,000 PSI. Following the heat treatment, each stud is centerless ground to make it as close to perfectly concentric as possible. Because ARP takes
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