SFI 1.1 Steel Billet 157 Tooth Ford Flywheel. Includes counterweights for 28oz. or 50oz. balance. 24lbs. NOTE: For '86-'95 applications, 5/16"-18 pressure plate bolts are required such as ARP 150-2201. http://www.sfifoundation.com/wp-content/pdfs/manufacturers/1.1%20Manufacturers%20List.pdf