Sway Bar D Mounts: FRONT 70-81F ++ others 1 & 1/8th (28mm)Front sway bars are held to the body by two "U" shaped brackets with this mount inside it size is 1 & 1 8 or 28mm front for many of the standard 2nd generation Firebirds & Camaro\'s, many of the big car series like Impala Bonneville GM etc. NOTE THAT SOME MODELS USED A BIGGER 1 1 4" 32 mm front bar also. This is the 1 & 1 8" inch main big bar type, this is typical of what was used from early 70's to later 70's in Firebird & Formula & Standard Camaro.