Made out of 1-5/8x.134" wall mild steel tubing. Uses the same rear suspension as our Eliminator II chassis kits. All round tube construction makes it the perfect choice for the "fast street car" classes. The 4-link brackets mount 3-1/2" off the ground on the upper and lower main hoop crossmembers. For cars where the main hoop is placed within 23" of the rear axle center line. Kit includes a pair of frame rails; two 4-link crossmembers; upper shock mount crossmember; upper shock mount tabs; rear crossmember; 1-1/4" frame gusset tubes; hardware; instructions and drawing. Shipped unassembled by UPS. Note: main hoop and cage rear struts are not included; they are part of the roll cage kit.