I have a 2K maxima and am thinking of buying a cat-back exhaust, not necessarily for hp gains but more for sound. As does anyone have experience with EBAY exhausts. I am very tempted by it because of its very cheap $200 price tag instead of the $600 greddy, HKS, or cattman exhausts. But I would hate to waste $200 on an exhaust that has fitment problems or will sounds horrible and I would rather save up the $600 and buy a quality systems so do you think the EBAY exhaust will be crappy? Because the last thing i want to is waste $200...