Industrial Injection 4BT 14mm Gorilla Girdle w/ ARP Xl Main Studs(Req Stamp Oil Pan)

The 14mm main studs included with this Industrial Injection Gorilla Girdle are a key upgrade for the Cummins 4BT engine. This girdle is designed to reinforce the main bearing caps, significantly strengthening the bottom end of your engine. When you're pushing a 4BT hard, especially with increased power or heavy loads, the stock main caps can be a weak point. This setup addresses that by tying the main caps together and providing robust clamping force with the ARP XL studs, helping to prevent cap walk and maintain crankshaft integrity under stress.

Crafted from well-built steel, the Gorilla Girdle itself is a solid piece of engineering. It works in conjunction with the ARP XL main studs to create a much more rigid foundation for your crankshaft. This improved rigidity is crucial for engines that see demanding use, whether it's for heavy towing, competitive pulling, or simply a high-performance daily driver. The package includes the girdle and the ARP XL main studs, but it's important to note that this system requires a stamped oil pan. If your 4BT has a different style oil pan, you'll need to source a compatible stamped version for this girdle to fit correctly.

Installing this girdle and stud kit is a significant undertaking, typically done during a full engine rebuild. It requires careful attention to detail, including proper cleaning of all surfaces and ensuring the crankshaft rotates freely after installation. The added strength and stability it provides can be a game-changer for the longevity and reliability of your modified 4BT engine, giving you more confidence when you turn up the boost or put the engine to work.