These coilover sleeves with seat can be used on many different types of shocks and struts to give you height adjustment capability. They are available with a 52mm ID as well as a 55 mm ID and the seat is for a 2.5" ID spring. It is sold as a single sleeve and seat kit that does one strut or shock,.. so you need to order 2 of them if you are doing one end of the car. The price gets you one sleeve and one seat as pictured.