ARP Flexplate Bolt Kit for Jeep 4.0L inline 6

ARP 146-2901 Flexplate Bolt Kit for Jeep 4.0L Inline Six-Cylinder

The ARP 146-2901 is a direct-fit flexplate bolt kit engineered specifically for the Jeep 4.0L inline six-cylinder engine. ARP Pro Series fasteners are manufactured from premium 8740 chrome moly steel and heat-treated to 180,000 PSI tensile strength, far exceeding the yield strength of factory flexplate bolts. Whether replacing worn or stretched OEM hardware during a transmission service or building a performance Jeep powertrain, the ARP 146-2901 delivers the reliable clamping load needed to keep the flexplate firmly secured to the crankshaft under all operating conditions.

Features and Benefits

• Manufactured from ARP 8740 chrome moly steel for superior strength
• Heat-treated to 180,000 PSI tensile strength
• Direct replacement for OEM flexplate bolts on Jeep 4.0L inline six
• Black oxide finish provides corrosion resistance
• Precision machining ensures consistent head-to-shank dimensions
• Includes ARP Ultra-Torque fastener assembly lubricant
• Trusted by professional Jeep builders and off-road fabricators

Fitment

Specifications

What's Included

• ARP 146-2901 Flexplate Bolt Set
• ARP Ultra-Torque assembly lubricant

Frequently Asked Questions

What vehicles does the ARP 146-2901 fit?
The 146-2901 is designed for Jeep vehicles equipped with the 4.0L inline six-cylinder engine, including Wrangler and Cherokee models from 1987-2006.

Why upgrade from factory flexplate bolts to ARP?
ARP bolts are made from 8740 chrome moly steel heat-treated to 180,000 PSI tensile strength, significantly stronger than OEM hardware. This reduces the risk of fastener failure during transmission swaps, torque converter changes, or hard off-road use.

Does the ARP 146-2901 require a torque specification different from OEM?
Yes. Always use ARP's recommended torque value and the included Ultra-Torque lubricant. Refer to the included instruction sheet for the correct torque specification.

Is the ARP Ultra-Torque lubricant required?
Yes. The Ultra-Torque lubricant compensates for the differences between torque and clamping load when compared to motor oil or anti-seize, which can lead to incorrect preload if used instead.

Can the ARP 146-2901 be reused?
ARP recommends inspecting fasteners for damage or stretch marks before reuse. In most street applications, the bolts can be reused if they pass visual inspection and are re-torqued with fresh lubricant.

Are ARP flexplate bolts available for other Jeep engines?
ARP offers fastener kits for a wide range of Jeep and other vehicle applications. The 146-2901 is specific to the 4.0L inline six.

What is the finish on the ARP 146-2901?
The 146-2901 uses a black oxide finish which provides basic corrosion resistance in the protected environment of the bellhousing.

Is the ARP 146-2901 a Pro Series or Custom Age kit?
The 146-2901 is an ARP Pro Series kit using 8740 chrome moly steel, providing excellent strength for street and mild off-road performance applications.

Installation Notes

1. Remove the transmission and torque converter from the vehicle.
2. Remove the old flexplate bolts and inspect the flexplate for cracks or damage.
3. Clean the crankshaft flange bolt holes of any thread compound or debris.
4. Apply ARP Ultra-Torque lubricant to the threads and underside of the bolt heads.
5. Thread in the 146-2901 bolts by hand until snug.
6. Torque to ARP specification in a cross-pattern sequence.
7. Reinstall the torque converter and transmission per manufacturer service procedures.

CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.