I have a Borla on my car with the MSDS headers and the sho shop Y pipe and my car is loud as hell when you get on it. The only time it has a nice mellow sound to it is when I am sitting there at an idle.(there are no cats on my system at all though) hehehe They fell off.

98 SVT 18" Enkei RS6's, NITTO 555 Extremes Intrax lowering springs K&N filter Sho-Shop Y pipe (without cats) Stock "gutted" manifolds Carbon Fiber Cowl hood Carbon fiber sail panels