Get replacement and upgraded hardware with Head Studs & Fasteners that you need to hold the engine together in your 2011-2016 Chevy/GMC 6.6L LML Duramax. Upgraded fasteners and head studs are engineered to handle the increased power of your engine with performance components. Head Studs and Fasteners are available for high-performance applications with increased power outputs, as well as OE-style replacements that are engineered to maintain the factory function. 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.