personally, i would go somewhere with a good rep. it's worth the travel
I would just like to take the opportunity to recommend croydon racing developments. I had a 3 inch turbo back exhaust (standard cat), dump pipe, hybrid FMIC, hks pod. The engine had some issues generating power after 4500rpm, and the car was dynoed a month ago making a measly 164kw at the flywheel. I took it to croydon, and they found that I had the wrong spark plugs, my o2 sensor was buggered, fuel pump wiring was passed it's exp date, and that my coils needed replacing.
After correcting the following issues, and installing some splitfire coils, manual boost controller and a magnaflow high flow cat, i'm now making 202rwkw!!!
Boost comes on early, and makes the car an absolute joy to drive. I cannot believe the improvement. Now i have a dilemma, IM RUNNING OUT OF ROAD
Anyways, croydon were really helpful, and took the time to explain things (unlike other mechanics I've delt with). I would recommend them to anyone looking for a good performance workshop in sydney