Upgrade Your LBZ, LMM & LML Duramax for Maximum Strength. The Gator Fasteners Heavy Duty Main Stud Kit (MSK66ZM) is built to handle the extreme conditions that 6.6L LBZ, LMM & LML Duramax Diesel engines endure. Whether you're pushing high boost, heavy towing, or racing, these main studs provide maximum clamping force and durability.

Unlike factory bolts that can stretch and weaken under stress, Gator Fasteners HD220 main studs ensure long-term reliability and performance in demanding conditions.

When it comes to durability and strength, Nothing Bites Like Gator!

• Heavy-Duty Main Stud Kit - Designed for 2006-2016 6.6L LBZ, LMM, & LML Duramax Diesel engines.
• Stronger Than 8740 Chromoly Steel - Manufactured from HD220 material, providing significantly greater strength than the 8740 used by competitors.
• Superior Clamping Force - Helps maintain main cap alignment under extreme loads for increased engine reliability.
• Rolled Threads After Heat Treating - Enhances fatigue resistance and prevents thread failure for long-lasting durability.
• Corrosion & Wear Resistant - Built to withstand the harshest environments and high-performance applications.
• Includes High-Quality Nuts & Washers - Complete kit for a secure and precise installation.
• Ideal for High-Performance & Heavy-Duty Applications - Perfect for towing, racing, and extreme off-road use.