Replace and upgrade the hardware that holds your engine together with Head Studs & Fasteners for your 2007.5-2010 Chevy/GMC 6.6L LMM Duramax. 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. Performance fasteners and head studs feature increased tensile strengths that are ideal for automotive enthusiasts with high-performance applications. For those with stock applications, OE-style replacement fasteners and head studs are available to maintain 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.