The Ultra-Pro laser link 4-link system from SW Race Cars features the optimum in tuning adjustments, 144 possible instant centers and is designed to withstand even the most severe drag race applications. The top bars are 1-1/4 x .095″ 4130 chrome moly tubing and the bottom bars are 1-3/8″ x .095″ 4130 chrome moly tubing. Weld in tube adapters feature wrench flats for easy adjustability. All brackets are 4130 chrome moly steel and precision, water-jet cut with 5/8″ holes for super strength and a wide range of adjustments. Grade 8 hardware, (4) Frame brackets # 40-117-1, (2) rear housing brackets # 40-117-2 (2) #06-013CM. Also included is a 1-1/4″ chrome moly, cross tube to reinforce the brackets and housing. Rod ends are not included.