My tailpipes are rotten on my '92 LSC. The rest of the system looks sound enough but... I wouldn't mind it sounding a bit nicer. Not loud, but a nice deep rumble. Maybe this is my opportunity to do something about it. While I'm at it, what difference, if any, will removing the 'cats' make? I mean to the following: a) Performance b) Fuel consumption c) Noise level Does anything else need to be altered to suit, like the engine management?