INDEPENDENT SUSPENSION W/O AIR SUSPENSION. Left.AWD. Right.AWD. Upper mount bolt. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Active Suspension Air Spring to it's Mounting point. Bolt used to fasten the strut Mount. Part cannot be reused/reinstalled. and Assembly. and Assembly - HEX. HEAD. Spring. Strut.