sc400 cruiser

take your serial number and go to a lexus dealer and they can look up the necessary codes and should be able to provide a key or give you the info to get one from a locksmith.

not sure if the locksmith can look up the serial number to get the key cut. also do you have coverage from your insurance carrier for replacement keys if lost. some insurance companies provide that coverage.

Stock will give you are much nicer ride, but the 18" will give you superior handling! The 18" also give you a better look, that car is made for them! I have 18" on my SC400 and love the feel for handling and drive. It boils down to your preference.