Get the upgraded and replacement hardware you need to repair or assemble the engine in your Gas Vehicle. Upgraded fasteners and head studs are engineered to handle the increased power of your engine with performance components. Head Studs and Fasteners are available as OE-style replacements that maintain the factory function of the OEM component. You can also purchase performance head studs and fasteners that are engineered for high-performance applications with high power outputs. At XDP, you can find high-quality manufacturers like ARP, Fluidampr, and more who produce head studs, head bolts, flex plate bolts, fuel injector hold down bolts, and more.