Slayer:
As you no doubt realise I organised a large group buy from Hi Tech some time ago, Im pretty sure I can still source their systems for SAU members for the same price.
I was using an HKS Hyper Cat Back system on my car and removed it and fitted a complete custom made system from Hi Tech which was used a the test mule for the group buy.
They fitted a complete 3 inch system in stainless, all polished with a resonator in the rear section to keep out the drone and a nice angled muffler. They also use a good quality Hi Flow Cat.
I found the response increase after the Hi Tech front/dump pipe and new rear section to be quite good, it certainly sounded better and was quieter than the HKS system.
They can use different resonator options at the customer request depending on what sort of noise level you are after.
The group buy price was $1100 for the cat back system with any choice of rear muffler and resonator included (Fitted) or $700 for the Front pipe, dump pipe and Hi Flow Cat (Bargain)
Unfortunately I never got round to dynoing mine to get a specific Dyno figure but the system was definately worth it.
They are able to ship interstate also and did in fact sell many of the systems to Melbourne buyers.
If you want to find out more call Pete at Hi tech Lewisham on
(02) 9569 5888