Yikes!!

I recently bought a '04 G-car from LoD and evertyhing was fine and at a very good price. Car was in perfect condition and Platinum Motors, out here in Ca., confirmed it had all the updates and is in good shape.
Now I'm wondering if I should be looking for something wrong? Any thoughts?

BTW the G-car exhaust that Platinum sells is pretty cool sounding, especially in mid-range where it is tuned to give a bump in power (which the G-car needs). Only minor conern is there seems to be a resonance at about 2500 rpm which excites a 'tizzy' sound from the engine bay. Overall it is a big improvement on sound and a modest improvement on power.