1989-2002 Cummins 12mm Gorilla Girdle W/ ARP XL Main Studs (PDM-06021)
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Description
Description
Industrial Injection Gorilla Girdle for 1989-2002 Dodge Ram 2500/3500 trucks running the 5.9L Cummins (both 12V and 24V eras). Ties the main caps together with ARP XL main studs to stop main cap walk under high cylinder pressure — required upgrade on big-power builds where stock main bolts are stretching or main caps are working.
The girdle is a billet aluminum plate that bolts across all seven main caps. Distributes load across all caps and dramatically increases main cap stability, especially in builds running 60+ psi boost or making 800+ HP.
Features
Features
- Billet Aluminum Gorilla Girdle
- 12mm ARP XL Main Studs
- Ties Together All 7 Main Caps
- Required Upgrade for Big-Power 5.9L Builds
- Part Number: PDM-06021
Notes
Notes
- Kit Includes: 1 Gorilla Girdle, 14 top spacers (large hole), 12 bottom spacers (small hole), 1 rear main spacer bar, new oil pan bolts and lock washers, 2 rear main stud nuts (12-point), oil pickup spacer with bolts, 12 main stud nuts (Nylock).
- Before final torque, check the main stud torque — 12mm ARP 2000 spec is 125 ft-lbs.
- Big Iron oil pan (BI591224VOP or BI591224VOPMS) is the typical pairing — the stamped variant has a relief pressed in for the girdle.
Questions and Answers
Questions and Answers
Previously asked questions
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Can you use a king speed oil pan with a 12mm girdle and still clear the frame?
Yes!
