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 Thread Size: 1/2 in.-20 Underhead Length (in.): 1.000 in. Washer Included: Yes 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 Please Note: Rated at 260,000 psi. Designed for use on top fuel applications Applications 1970 – 1971 Dodge Challenger 1966 – 1971 Dodge Charger 1966 – 1971 Dodge Coronet 1968 – 1971 Barracuda 1963 – 1964, 1966 – 1970 Plymouth Belvedere 1963 – 1965 Plymouth Fury 1967 – 1971 Plymouth GTX 1966 – 1967 Plymouth Satellite What\’s In The Box? 8 – Bolts Warranty Manufacturers Standard Warranty