For me the difference is minimal. I have a Pontiac 400 in a car that was originaly a 6 banger. If you add a factory tilt wheel or ram air package to a car that never had those options you are not doing anything different than a person adding after market parts. Put a car with "pontiac" or "factory correct" parts added and display the PHS documents saying the car never had those parts and then let someone make judgements on the car. I'm not trying to pass my car off as something it never was. My "modified" clone car allows me to enjoy cruising. At every car cruise I go to, there is a person that looks upon my car negatively, but rest assured a few seconds later I will get ten fold in compliments. You can look at a car see aftermarket rims, but before judgement is passed think about all of the non-original stuff is on your own car. I love both original and modified cars.... Keep them coming.