German '87 N/A Supra

I was wondering if anyone knew the differences between Euro Spec Supras and American Supras? The only one I've heard so far are the exhaust (no cat, :D ) and different marker lights in the front. I'm not new to cars by any means, but I am to the sport compact scene. I just bought the car here in Germany on the base I'm stationed at. It's pretty quick right now, but needs some definite improvment. Any suggestions or input are welcome. Thanks.