I have just fitted a redback exhaust that I sourced via EzBoy....I was in the same situation, the piping had turned to swiss chese, and the welds were failing. You run over a few dead animals over my way which doesn't help.

Engine/breathing mods already: K&N Panel in factory airbox.

Anyway, instantly quieter, and throatier down low. Up in the high rev range it seems pretty quiet for a stock exhaust. Has a nice rumble to it without being loud.

Engine/Breathing mods to come: EzBoy Monsta-flowed Throttle Body (Should be arriving tommorow for fitment over the weekend... ), and possible inlet resonator removal/plugging to extract a little more 'rorty' sound from it......

If you are doing the lot, and since you are in NSW... just go see EzBoy and get the works with a redback system, replace the cat, and see what he can do for you with the headers/extractors. He does a better deal for you than eBay - we are talking supply & fit (minus any tip) for less than what you buy them off eBay for BEFORE FREIGHT!!
And it is good to support our own people.....

He told me he was driving his Dad's XR6 ute today, and there was a mitsu V6 in the back of it.....Ian's cooking up something for the 3L 6G72's and that's all I am going to say, apart from the fact I will be first in line.....