Flexplate Bolt Kit - Ford 6.4L Diesel

The ARP Flexplate Bolt Kit for Ford 6.4L Diesel is engineered for builders and mechanics who demand reliability in high-stress engine applications. When you're running a PowerStroke diesel with increased horsepower, stock fasteners become a liability—they stretch, shear, or fail under load. This 10-piece set replaces the factory bolts that connect your flexplate to the crankshaft, a critical joint that transmits all engine torque to the transmission. Whether you're tuning for towing capacity or building a competition engine, proper flexplate fastening prevents catastrophic drivetrain separation.

ARP's chromoly construction with black oxide finish delivers superior tensile strength and corrosion resistance compared to OEM bolts. Each fastener measures 10 mm diameter with a 1.00 thread pitch, 1.275 inches in length, and features a 12-point hex head for precise torque application and repeatable clamping load. Chromoly steel resists stress concentration and fatigue cracking, while the black oxide coating provides protection in the harsh engine bay environment without sacrificing grip or preload accuracy. The 12-point configuration reduces the risk of bolt rounding during installation—critical when working in tight flexplate-to-crank spacing on the 6.4L platform.

This kit is essential for any Ford PowerStroke 6.4L diesel owner upgrading fuel systems, injectors, or tuning modules that increase cylinder pressure and engine output. Mechanics performing transmission rebuilds, converter swaps, or major engine work should always replace flexplate bolts with ARP hardware to ensure longevity and safe power delivery. Installation requires proper torque specs and a quality inch-pound wrench—ARP specifications must be followed exactly to maximize clamping force without over-tightening. The set of 10 provides all fasteners needed for complete replacement on your Ford diesel platform.