Hi guys, I Live in Tamworth which is about 3 hours north of Newcastle. I have just got a new nizpro 4" exhaust and what I had before was a standard exhaust with just a bigger cat. Loads of other mods and made 300rwkw at 12psi and 361rwkw at 19psi. I want to see how much Improvement its made with the nizpro exhaust. In Tamworth there are dyno tuners but none with good reports so I think I might go to Newcastle and if I really really have to I'll go Sydney but I'd prefer not to travel 5 and a ha