Gator Fasteners MSK667Y Main Stud Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Heavy-duty design for high-performance builds
• Prevents main cap walk and crankshaft movement
• Ideal for towing, racing, or daily driving
• High-strength studs resist stretching under load
• Designed for LB7 and LLY Duramax engines
• Maintains bottom-end integrity under high stress
• Superior to factory main bolts
• Supports long-term engine reliability
• Great upgrade during engine rebuilds
• Heat-treated for added durability
• Provides increased clamping force and stability
• Built to handle extreme power levels

Build Your Bottom End With Confidence And Strength

If you're planning to push your Duramax harder, whether it's towing heavy loads, chasing ETs at the track, or just building a motor that can take a beating, the stock main bolts aren't going to cut it. The Gator Fasteners MSK667Y Main Stud Kit is built to handle the pressure and hold everything together where it matters most. These heavy-duty main studs are designed specifically for the 2001-2005 GM 6.6L Duramax LB7 and LLY engines, and they provide the clamping force needed to keep your main caps locked in place. Unlike factory bolts that stretch under stress, these studs maintain their strength under extreme conditions, giving your bottom end the security it needs. They're perfect for anyone rebuilding a motor, upgrading internals, or simply looking to avoid the risk of bottom-end failure down the road. With added strength and durability, they turn your engine from just capable to truly built. Whether it’s your work truck or your weekend toy, this kit helps ensure your build is ready for whatever you throw at it.

Precision Machined And Tested For Serious Duramax Power

The Gator Fasteners MSK667Y Main Stud Kit is engineered for performance and durability in high-stress diesel builds. Manufactured from high-strength materials and heat-treated for enhanced resilience, these studs provide a significant upgrade over factory main bolts. They are designed to prevent main cap walk, which can occur under high cylinder pressures or during aggressive use like towing, tuning, or racing. Each stud delivers improved thread engagement and consistent clamping force, reducing the chances of bottom-end shifting or crank distortion. This kit is tailored for the 2001-2005 Duramax LB7 and LLY platforms, ensuring precise fitment and optimal load distribution across the block. Their design allows for repeated torque cycles without fatigue, making them ideal for engines that will be disassembled and rebuilt more than once. Whether you’re building for reliability or chasing power goals, these main studs provide the foundation your engine needs to perform at its best.

Fits: 2001, 2002, 2003, 2004, 2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Designed for 2001–2005 6.6L Duramax LB7 and LLY engines
• Recommended for high-performance or heavy-duty engine builds
• Ideal upgrade during engine rebuilds or bottom-end work
• Replaces factory main bolts with stronger, non-stretch studs
• Helps prevent main cap walk and crankshaft distortion
• Supports engines under heavy load, towing, or racing conditions
• Made from high-strength, heat-treated materials
• Ensures consistent torque and clamping force over time
• Not required for stock power levels, but highly recommended
• Improves long-term engine reliability and durability