Alright so I have what may seem like a stupid question. I have a 2000 Mustang gt with a 5 speed. Is there anyway to tell (without pulling the motor apart) what aftermarket parts I have on my motor? I know I have a CAI, aftermarket coil packs, and aftermarket exhaust (x pipes). My curiosity is peaked because there are stickers under the hood for things like Koni shocks and UPR products. Just a few questions I had...I don't really know what help you guys can offer on this I just wasn't sure if there were things I could look for driving wise that would indicate upgraded internal engine parts. Sorry if this is basic but this is really my first sports car ( I did have a 1990 rs Camaro with a 305 but that thing cant begin to touch the car that I have now). Also, I have read a lot about tunes. Is this something that I can get done with just the information I have now? And would I really benefit from a tune with the above listed (known) modifications? Thanks guys.