Can you tune a Lamborghini?

A few months ago in having a argument at school. Im saying a supra can be tuned and modified to beat a Lamborghini, the other guy is a no car knowledge Lamborghini fanboy. He says you can modify a Lamborghini to beat a Supra. Im saying you cant do it because that would ruin the perfect custom tuning a Lamborghini has and therefore making it slower. Who is right?