Replace and upgrade the hardware that holds your engine together with Head Studs & Fasteners for your 2020-2023 Chevy/GMC 6.6L L5P Duramax. You can find the perfect Head Studs & Fasteners for your vehicle whether it's a stock commuter that needs OE-style replacements or a high-performance application with increased power. Improved fasteners and head studs feature higher tensile strength that ensure they can handle the increased performance and power of your engine. Find the Flex Plate Bolts, Fuel Injector Hold Down Bolts, Head Studs, Head Bolts, and more from top manufacturers like ARP, Fluidampr, and more at XDP.