a true coilover set. this mean a full suspension kit which includes springs and adjustable shocks. these are pricey, however, running about $1300 for a whole kit. Tokico, IMO makes the best suspension kit. if you have a GSR, adjustable coilovers are nice. the ride will be bumpier, but not so much. if you can't afford a full suspension kit, investing in adjustable SHOCKS (not coilovers) would be a good idea. that way, you can adjust the height of the car without sacrificing ride quality, all the while keeping your stock springs on. but, adjustable shocks are more expensive than adjustable springs (coilovers).