One thing I would be worried about is the fact he/she has exhaust tips on it or exhaust system and couldn't tell you what was for sure wrong with the supercharger...could be someone who don't know much about cars. I know just because you have a exhaust system it dont mean you have to know about cars..but IMO you should know some! I would be worried that they beat the every living crap out of the car...you need to ask them when is the last time they changed there SC oil. If they dont know what your talking about I would be worried that the car was beat in the ground! Still I think you can replace a whole GenV for around 600 bucks but still that would concern me!