ok now lets think... " I'm sure a smart person wouldn't swap a dpfi system into a mpfi system" yea cuz smart people like their cars slow right... i think you might of ment to put that the other way around and you keep saying there are a bunch of other ways to check... but NEVER name any of them.. yea you are half right... you can check the interior, exterior, engine etc.. because the different trims have different features... but that can be all swapped and changed around... like i said the best way is the vin...