i have a 1993 lexus sc 300 and i know i have an exhaust leak. how much would a new system cost with the labor? i was thinking of getting an after market one that will give some more power and sound better. anyone know any kinds? i dont want it to sound like a weed wacker

Get an aftermarket one, it might run you about $600 or so

It would cost you anywhere from $200 - $1000+ depending on the brand, type and who installs it. I'd say go with Gibson or Flowmaster for the best sound and quality.

You have a 300 so go with a single exhaust set up. Get a straight through muffler off of ebay. Search for "N1". 2.25" or 2.50" inlet, 4" outlet. Cat-back. have a mufflef shop do the work. should only be about $200