My mate had a car like urs, only JDM ef2, but ill tell you he didnt really do any mods, he modded the airfilter a bit, sounded good... love the carby backfire tough as nuts! ill let u know when we went up to dande mountains together that guy was unstopable! i couldnt ever keep up with him! even when i got my brothers mr2 turbo out! ahahhaha
just keep in mind, every car has a different purpose, a GL ED civic is a great training car! love the shape to!