ARP 147-2901 12-Point Flexplate Bolts M12x1.25 for 89-07 Dodge 5.9L Cummins

Vehicle Fitment

• 1989-2007 Dodge Ram 2500/3500 (5.9L Cummins, 12-Valve and 24-Valve, Automatic Transmission)

Fitment Notes

• Designed for 12-valve and 24-valve 5.9L Cummins engine applications
• Some retailers list extended compatibility with later 6.7L Cummins applications (through 2010-2018); this was not independently confirmed by two high-trust sources and should be verified against your specific flexplate before ordering
• Not legal for use in California or other states with similar emissions-related regulations on certain vehicle applications

Features

• Far superior strength and reliability compared to OEM flexplate bolts
• Forged from 8740 chromoly steel and heat-treated prior to thread rolling and machining
• Exclusive flat 12-point head design for a secure, low-profile fit
• Larger-than-stock shank diameter and underhead radius for increased strength and improved register
• Each bolt centerless ground so the bearing surface sits perfectly perpendicular to the threads, ensuring equal load distribution
• Black oxide finish for corrosion resistance

Specifications

• Part Number: 147-2901
• UPC: 672036036348
• Thread Size: M12 x 1.25
• Underhead Length: 0.700"
• Head Style: Flat 12-Point
• Socket Size: 3/4" 12-Point
• Material: 8740 Chromoly Steel
• Finish: Black Oxide
• Category: Flexplate Bolt Kits

Included Components

• 8x ARP Pro Series 12-Point Flexplate Bolts

Product Description

The ARP 147-2901 is a Pro Series flexplate bolt kit built for the 1989-2007 Dodge Ram 5.9L Cummins, covering both 12-valve and 24-valve engine applications. Flexplate bolts see more repeated vibration and fatigue stress than almost any other fastener in the drivetrain, transferring the engine's combustion energy to the transmission - factory hardware is a common weak point, especially once power output climbs above stock levels.

Each bolt is forged from 8740 chromoly steel and heat-treated before the threads are rolled, giving them significantly better fatigue resistance than bolts machined the conventional way. The flat 12-point head design and larger-than-stock underhead radius add strength and improve how the bolt registers against the flexplate, while centerless grinding keeps the bearing surface perfectly perpendicular to the threads for even, consistent clamping load.

This kit is a straightforward, worthwhile upgrade when installing a new or upgraded flexplate, or simply replacing aging factory bolts before they become a failure point. It's especially relevant for trucks running increased power levels, where the added vibration and torque loading make reliable, high-strength fasteners more important than on a stock setup.