MSK394BT Main Stud Kit

Features:

• Fits 1989–1998 Cummins 3.9L 4BT engines
• Designed for towing street or race builds
• Prevents bottom end movement under load
• Stronger than factory main bolts
• Resists stretching in high-stress conditions
• Heavy duty construction for added durability
• Ideal for stock or modified engines
• Improves bottom end reliability and strength
• Perfect for high-performance engine builds
• Secure fit for long-term engine integrity

Serious Strength for the Heart of Your Build

If you're working with a 1989 to 1998 Cummins 3.9L 4BT, you already know how tough these engines can be. But when it's time to build for more power, towing capacity, or long-term reliability, factory hardware doesn't always cut it. The Gator Fasteners MSK394BT Main Stud Kit is designed to reinforce the bottom end of your engine, keeping everything locked in place even under serious stress. Whether you're putting together a heavy-duty tow rig, a performance project, or just want a rock-solid foundation for your daily driver, these main studs offer the extra confidence that only heavy-duty fasteners can deliver.

Built to Handle More Power and Pressure

Unlike stock main bolts, which can stretch or lose torque under load, Gator Fasteners' main studs are built to handle high cylinder pressures and demanding engine conditions. This added strength keeps the crank securely seated and helps prevent movement that can lead to bearing wear or bottom-end failure. They're a smart investment for anyone pushing their 4BT beyond factory limits, especially in builds where power and reliability are both high priorities. Easy to install and built to last, this kit gives you the peace of mind that your bottom end is ready for whatever you throw at it.

Fits: 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 Dodge 4BT 3.9L Cummins