Flywheel Bolt Kit by ARP These Pro series flywheel bolts from ARP give you all that you need to bolt in your flywheel with confidence. They\’re much stronger than OEM hardware, are forged from aerospace alloy, and are heat-treated prior to thread rolling and machining. These bolts feature an exclusive, flat 12-point head design and a larger-than-stock shank diameter for increased strength and improved flywheel register. Features Rear Main Seal Style: 1-piece Thread Size: M10 x 1.0 Underhead Length (in.): 1.000 in. Washer Included: No Head Style: 12-point Fastener Finish: Black oxide Fastener Material: Chromoly Benefits Much stronger than OEM hardware Forged from aerospace alloy Heat-treated prior to thread rolling and machining Applications 1997 – 2004 Ford F-150 1997 – 2004 Ford F-250 1999 – 2004 Ford F-350 1996 – 2004 Ford Mustang What\’s In The Box? 8 – Bolts Warranty Manufacturers Standard Warranty