ARP Pro Series connecting rod bolts are precision CNC-machined to exacting specifications and designed for optimum reliability. They are heat-treated and threads are rolled to provide up to ten times more fatigue strength. This makes them far superior to standard OEM fasteners in terms of durability, and fully capable of handling the extra stress of high-combustion engines.General replacement ARP2000 rod bolts, PairFeatures:Connecting Rod Manufacturer: General replacementCap Retention Style: Cap screwRod Bolt Head Style: EFastener Yield Strength (psi): 200,000 psiThread Size: 3/8-24 in. Connecting Rod Bolt Material: ARP2000 alloy Underhead Length (in): 1.500 in. Nuts Included: No Quantity: Sold as a pair