Description These studs are larger than original you will need to Drill and tap your block to accommodate them . Part of the secret to making huge hp on the stock block. Magnus GTR Main Studs Bolts is the replacement kit with 12mm bolts that you need to keep your block together. The kit includes a set of 16 Main Stud Bolts with 8740 Alloy nuts and washers. Magnus Studs are made of L19 Premium Steel to be superior in strength delivering up to 260,000 PSI clamp load. “L19: This is a premium steel that is processed to deliver superior strength and fatigue properties. L19 is a very high strength material compared to 8740 and ARP2000 and is capable of delivering a clamp load at 260,000 psi. It is primarily used in short track and drag racing applications where inertia loads exceed the clamping capability of ARP2000.” – ARP Head gasket sealing tip from our expert engine builder Marco Passante: “Put together your next engine build with these Magnus Studs, a smooth surface finish of less than 40RA on the block and head in conjunction with our gaskets, and have a proper seal on you engine that can withstand all the hp you can make.” Part# MMCENG1048 Magnus GT-R VR38 12MM Main Studs
