CalTracs Traction Bars1964-1965 Ford Falcon1967-1973 Ford MustangDrag Profile2 Hole2/pkg. Designed by Race legend John Calvert. Bolt On traction system. Full pre-load adjustability, keeps axle from rotating/maintains pinion angle, improves 60' times. Black powder coated for durability. Standard and Low Pro pivot plates available.Specializing in leaf spring traction systems since 1995, the Calvert Racing Team knows what it takes to get your car hooking harder than ever. Designed by racers for racers, CalTracs boasts unsurpassed quality and craftsmanship; the competition is eliminated right off the starting line. The preload link is made with Chromoly, lightweight but strong, ensuring maximum leverage and minimum flex. �� Rod Ends have a radial static load capacity of.