Calvert Racing 2301 CalTrac Low Profile Leaf Spring Traction Bars - 1967-69 Camaro/Firebird Complete bolt-on, no cutting, welding, or modifications to OEM suspension. Improves 60ft times. Eliminates spring wrap-up. Full preload adjustability. Leaf Spring Traction Bar, Adjustable, 67-69 Camaro/Firebird, Low Profile