I just noticed something. Why is it that the 1996 through 2000 Honda Civics are concidered the 6th Generation models, but yet when buying performance parts the 1999 through 2000 model Civics "can't" use the same parts as the 1996 through 1998 models? I know there are a few differences, but if they are the same Generation shouldn't they be almost identical under the hood??