ARP Head Studs 251-4703 for Ford Focus RS MKII 2.5L 20v 5-Cyl / Volvo B5254

• Brand: ARP
• Part Number: ARP-251-4703
• Country of Manufacture: United States

ARP Pro Series head studs are trusted by top professional engine builders for their competition engines. Manufactured from premium grade 8740 alloy and proprietary ARP2000 alloy, these studs offer strength ratings of 190,000 psi for 8740 material and 220,000 psi for ARP2000 material. Each stud is vertically heat-treated to ensure complete heat penetration, resulting in superior durability and performance compared to lesser quality alternatives.

ARP studs are centerless ground and thread rolled after heat treatment, ensuring precise tolerances and perfect alignment of gaskets and cylinder heads. This level of manufacturing accuracy allows for easier engine assembly and more consistent, accurate torquing, as the stud stretches only on the vertical axis when the nut is torqued. The use of studs, rather than bolts, provides a more even clamping force on the cylinder head, which is especially beneficial for engines that require frequent servicing.

ARP is recognized as a world leader in fastener technology, supplying high-performance OEM replacement parts and specialty hardware for a wide range of motorsport and marine applications. All aspects of the manufacturing process are controlled in-house in the United States to ensure optimum quality.