I have a few questions... First i had to replace my engine on my car and of course when you replace the engine you have to disconnect the battery well when i bought my S2000 used it didn't have the owners manual so I don't know the code for the radio. Can some supply it for me or is it unique to each car and I have a 2003.

Also is it really worth getting the mugen or spoon thermostat and thermostat switch?

 

It is unique to every car... contact your dealership.. they should be able to get you the correct radio code.