ive got a 3-3.5" catback i may look at selling..
its 3" at the cat, and tapers up to 3.5" at the muffler entry, with a 4" tip (apparently a slight upwards taper in exhaust is optimum).
its a japanese exhuast, came with the car when it was imported, dont know brand, but the dump is trust, may be trust aswell? not sure.
only reason for sale is id prefer a smaller twin system
send me an offer and ill consider selling it as my whale is 'beached' at the moment..
edit: if you are looking to sell the old exhaust, ill consider swap + cash too