LLY Duramax Studs & Fasteners

Upgrade your 2004.5–2005 LLY Duramax with premium studs and fasteners designed to handle high boost, heavy towing, and performance tuning. From head studs to main studs and critical hardware, these components offer superior tensile strength, precision fitment, and long-term reliability. Whether you're rebuilding or upgrading, trust high-quality fasteners to keep your Duramax engine sealed, secure, and ready for serious power.