---tab Description--- Description Upgrade your diesel engine’s performance and reliability with the SPELAB Head Stud Kit. Designed for high-stress applications, this kit is engineered to withstand the extreme pressures and temperatures of turbocharged diesel engines. Whether you’re building a race-ready engine or improving your daily driver’s reliability, SPELAB Head Studs ensure that your engine's cylinder head stays securely in place, preventing warping and blown gaskets. Fitment 2001-2004 Chevy/GMC LB7 6.6L Duramax Diesel 2005-2007 Chevy/GMC LLY/LMM 6.6L Duramax Diesel 2008-2010 Chevy/GMC LMM 6.6L Duramax Diesel 2011-2016 Chevy/GMC LML 6.6L Duramax Diesel Key Features Exceptional Tensile Strength:SPELAB's Cylinder Head Bolts are made from premium high strength alloy steel with a tensile strength of over 220,000 psi, ensuring long lasting durability and excellent clamping force compared to stock bolts. They can withstand the high boost pressures and temperatures common in diesel engines. Precision Machining:Our head studs are precisely engineered to provide the perfect fit, ensuring optimal torque and reliability. Each stud is manufactured with precision to ensure maximum durability and minimize the risk of failure under heavy-duty conditions. Heat-Treated for Superior Hardness:Each stud is heat-treated to a specific hardness, ensuring a consistent hardness of Rockwell C 39-44, which maintains strength and elasticity under stress. Corrosion Resistance:Black oxide finish provides excellent protection against rust and corrosion, extending the lifespan of the studs. performance optimization:Perfect for high-boost, high-performance applications where factory head bolts may fail, ensuring consistent and even distribution of clamping force. Specifications Brand: SPELABSKU：SPOS08873SPSize：10mm,5mm Allen,12ptColor: blackMaterial: 42CrMo High-Strength Steel Installation SPELAB Head Stud Installation ---tab Shipping & Returns--- Fast Shipping Policy Your order will be dispatched within 1-2 business days, and the package will arrive within your order's estimated date. Click for Shipping Policy Easy Return Policy Every order comes with a 14-day free return, which means you don't have to pay for a return slip. Click for Return Policy