What is the primary benefit of installing a main girdle?

A main girdle ties the main bearing caps together, significantly increasing the rigidity of the engine block's bottom end. This helps to prevent flexing and distortion under high loads, which is crucial for engines modified for increased power and torque.

Are the ARP XL main studs included in this kit?

Yes, this Industrial Injection Gorilla Girdle kit comes complete with ARP XL main studs. These are high-strength fasteners designed to provide a more secure and consistent clamping force on your main caps compared to factory bolts.

What kind of modifications is this girdle best suited for?

This girdle is ideal for Cummins 4BT engines that have been modified for increased performance. This includes upgrades like larger fuel injectors, performance turbochargers, or any other modifications that place additional stress on the engine block's bottom end.

Industrial Injection 4BT 12mm Gorilla Girdle w/ ARP Studs

Name: Industrial Injection 4BT 12mm Gorilla Girdle w/ ARP Xl Main Studs
Brand: Industrial Injection
SKU: industrial-injection-industrial-injection-4bt-12mm-gorilla-girdle-w-arp-xl-main--t14-4383919
Price: 1429.50 USD
Availability: BackOrder

Industrial Injection 4BT 12mm Gorilla Girdle w/ ARP Xl Main Studs

$1429.50

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Industrial Injection 4BT 12mm Gorilla Girdle w/ ARP Xl Main Studs

Key Features

Fits Cummins 4BT engines.
Features a 12mm thick steel plate for enhanced block rigidity.
Includes ARP XL main studs for superior clamping force and reliability.
Reinforces the main bearing support area to prevent flex under load.
Designed to handle increased power and torque from engine modifications.

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Product Details

The 12mm thick steel plate used in this Industrial Injection Gorilla Girdle is a key feature, significantly reinforcing the main bearing support area of your Cummins 4BT engine block. This isn't just a cosmetic addition; it's a structural upgrade designed to handle increased power and torque, especially when you're pushing your 4BT beyond its stock capabilities. By tying the main caps together with this girdle, you distribute the load more evenly across the block, reducing the stress on individual bearing saddles and preventing potential flex or distortion under heavy use.

Included with the girdle are ARP XL main studs, known for their strength and reliability. These studs replace the factory bolts and provide a more consistent and secure clamping force on your main caps. ARP has a solid reputation for producing high-performance fasteners, and these XL main studs are built to withstand the higher cylinder pressures and torsional forces that can arise from engine modifications. The combination of the robust steel girdle and the premium ARP studs creates a well-built foundation for a high-performance 4BT build, offering peace of mind when you're running your engine hard.

This kit is a smart choice for anyone rebuilding or significantly upgrading a Cummins 4BT, particularly if you're planning on adding larger injectors, a performance turbo, or other modifications that increase engine stress. It's a proactive measure to ensure the longevity and reliability of your engine's bottom end. While installation requires careful attention to detail, including proper torque sequencing for the main caps and studs, the benefits in terms of block rigidity and durability are substantial for modified 4BT applications.