Brand New Genuine ARP L19 Head Studs for Honda/Acura B16A, B18C1, B18C5, B20VTEC, LSVTEC, K20, K20A, K20A2, K20A2, K20Z1, K20Z3, K24A, K24A2. Our ARP-manufactured studs are made with L19 material, which has a tensile strength of 260,000 psi – much stronger than the typical 8740 chromoly. With a hex broach on the top, they are designed for easy installation, even with the cylinder head on the car if necessary. For those looking for the toughest head studs for high boost/horsepower turbocharged applications, look no further than the ARP L19 Head Studs. This is a premium steel that is processed to deliver superior strength and fatigue properties. L19 is known for its high strength, capable of delivering a clamp load at 260,000 psi. L19 is primarily used in short track and drag racing applications where inertia loads exceed the clamping capability of ARP2000. However, L19 requires special care during manufacturing to avoid hydrogen embrittlement, as it can easily become contaminated and subject to stress corrosion. To ensure their longevity, the material must be kept well-oiled and not exposed to moisture. NOTE: ARP Head Studs are used to connect the Cylinder Head to the Engine Block. Compatible with: B16A, B18C1, B18C5, B20VTEC, LSVTEC, K20, K20A, K20A2, K20A2, K20Z1, K20Z3, K24A, K24A2. Your address must be confirmed.