ARP ATP4165-1LUB Pro Series Custom Head Stud with Nuts and Lubricant

The ARP ATP4165-1LUB is a Pro Series individual cylinder head stud from ARP (Automotive Racing Products), the globally recognized leader in high-performance fastener technology. Designed as a replacement or supplemental single stud, this part is ideal for builders who need to replace a damaged or missing stud in an existing ARP head stud kit installation.

ARP Pro Series head studs are engineered to provide superior clamping force and resistance to stretching compared to conventional OEM head bolts. The included ARP assembly lubricant ensures accurate torque readings during installation by reducing friction at the thread interface.

Key Features:

• Cold-forged construction ensures optimal molecular integrity throughout the stud body
• Heat-treated prior to thread rolling and machining for enhanced strength and fatigue resistance
• 190,000 psi tensile strength rating — significantly stronger than OEM fasteners
• Precision-machined threads on both ends for consistent torque and reliable seating
• Includes ARP moly-based assembly lubricant for accurate and repeatable torque values
• Includes flanged hex nut(s) matched to the stud specification
• Manufactured in the USA to ARP's strict quality control standards

ARP's individual stud part numbers in the ATP series allow engine builders to source exact replacement studs without purchasing an entire kit. The ATP4165-1LUB designation indicates this is a single-stud unit with lubricant and nuts included, built to the same specifications as the corresponding full ARP head stud kit.