ARP Flywheel Bolt Kits - Ford V8 289-460 cu in - Pro Series

The ARP Pro Series Flywheel Bolts have a tensile strength of 200,000 Psi.

While they will fit a stock engine, they are engineered for high-performance and racing applications where OEM bolts may not suffice. For a completely stock street vehicle, they may be overkill.

You will need appropriate sockets or wrenches for the bolt heads and a reliable torque wrench calibrated to ARP's specifications. Some engine assembly experience is beneficial.

ARP generally recommends replacing these types of high-performance fasteners after removal, especially if they have been torqued to yield specifications, to ensure optimal security and performance.

The Pro Series bolts offer a higher tensile strength (200,000 Psi) compared to the High Performance bolts (180,000 Psi), making them suitable for even more extreme applications.

ARP recommends using their Ultra-Torque fastener lubricant or a comparable high-quality thread lubricant on the bolt threads and under the bolt heads.

Verify that you have the correct bolt kit for your engine. Ensure the crankshaft threads are clean and undamaged. Do not force the bolts; clean the threads and try again. Use a small amount of lubricant as recommended.

Ensure you are using a calibrated torque wrench. Follow the multi-stage tightening procedure recommended by ARP. Make sure the bolt threads and mating surfaces are clean and properly lubricated per ARP's instructions.

This typically indicates cross-threading or excessive force. Stop immediately. Inspect both the bolt and crankshaft threads for damage. If damaged, the crankshaft threads may need repair (e.g., with a thread insert) or replacement. Ensure proper technique and lubrication on subsequent attempts.