ARP 275-4701 Head Studs for Lancia Delta Integrale 2.0L 16V

• Brand: ARP
• Part Number: ARP-275-4701
• Country of Manufacture: United States

The ARP 275-4701 Pro Series head studs are engineered for the Lancia Delta Integrale 2.0L 16V, delivering reliable clamping force and precise alignment for high-performance and competition engines. Manufactured from premium grade 8740 alloy and ARP2000 proprietary alloy, these studs offer strength far superior to standard “aircraft” quality steels. Each stud is vertically racked and heat-treated to 190,000 psi for 8740 material and 220,000 psi for ARP2000, ensuring full heat penetration and consistent metallurgical properties.

ARP head studs are centerless ground and thread rolled after heat treatment, resulting in exceptional dimensional accuracy and surface finish. This allows gaskets and cylinder heads to align perfectly during assembly, reducing the risk of distortion or misalignment found with lesser quality fasteners.

Stud installation enables easier engine assembly and servicing, particularly in racing applications where frequent teardown is required. Unlike bolts, which twist under torque and are subject to multiple forces, studs are installed hand tight and only stretch on the vertical axis when torqued. This ensures more accurate and consistent torque readings and a more even clamping force across the cylinder head.

ARP is a leading manufacturer of engine and driveline fasteners, supplying hardware for OEM replacement and motorsport applications worldwide. All manufacturing processes are controlled in-house in the United States, ensuring consistent quality and performance.