Our state-of-the-art Stage 3 Kit features the same heavy-duty components as our Stage 2 Kit, plus Cobra Automotive’s exclusive slider shackles, solid front eye bushings and leaf springs. This kit automatically lowers the car 1” with these de-arched springs while allowing the ultimate in freedom of rear spring movement without any lateral deflection. Welding is required to mount rear sliders. This kit is designed for use on full competition cars. Stage 3 rear suspension, road race for '65/66 with 3" axle tube with sliders.