Building a tough engine? These ARP head studs are what the pros use, especially for BMW 535 engines with turbos, nitrous, or high compression. They're made from premium 8740 alloy, heat-treated to a crazy 200,000 psi, and centerless ground so they're super straight – that means your cylinder head and gasket slide on perfectly aligned. Threads are rolled after heat-treating, making them about 10 times more fatigue-resistant than cheaper studs. Some are even undercut to equalize stretch and clamp force, which helps prevent blown head gaskets. Basically, if you want maximum sealing and reliability for your performance build, these studs deliver. They come in a complete kit (part number 201-4602), weigh about 4 pounds, and are built to handle serious power. Trust ARP for peace of mind when you're pushing your engine hard.
