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The Industrial Injection 4BT Gorilla girdle is a 14mm unit supplied with ARP XL main studs and requires a stamped oil pan for fitment. Built to strengthen the lower end of 4BT engines, the girdle increases main cap clamping and bottom‑end rigidity, making it suitable for rebuilds or heavier duty use when installed with the correct oil pan configuration and stud torque procedures.
Industrial Injection 4BT 14mm Gorilla Girdle w/ ARP Xl Main Studs(Req Stamp Oil Pan)
