PQ Series SFI Billet Steel Flywheel - Ford 260-351W Small Block 1964-95, SFI, small flywheel, drilled & tapped for removable weight, 24 lbs, Internal Balance, 157 Teeth. SFI certified; Manufactured from 1045 Billet Steel; CAD Engineering and CNC Machined; Award winning designs year-after-year;