Someone I know has this for sale '96-'04 Mustang 4.6 2V 2.1L Supercharger in black and it has 4k miles on it.I saw it installed on his car the beginning of the summer he put miles on it and has gone to the track twice where the launches where from idle.I guess what i'm saying is his system is still in like new condition.He paid 5k for it....now he wants to go entirely different way and wants to sell THE ENTIRE KIT...everything that came from KB What is this worth right now? TIA