Strutmasters builds automotive struts and springs for cars. We also provide both replacement air ride suspension parts, including air springs, air struts, compressors, air bag suspension and dryers, and conversion kits that, convert your car to high quality passive suspension systems. Air shocks air springs, air struts and other air ride suspension parts wear out. We give you the option of replacing them with top quality passive suspension parts engineered to fit your specific application. We have been designing and building suspension conversions since 1999 when we produced our first Lincoln air suspension kit. We maintain a fleet of test cars that we try out new products on.