None at all compared to the GT3037-56T, it is ultra silent which is kind of what i needed as the boys in blue do not like noisy cars and you could hear the old whistle from miles away!
Ah, well post up in the WA section and see if any of the guys want to come give you a hand to diagnose for a few beers or something?
Bit hard to help you from the other side of Australia
Big difference from $199 too $400 though mate! And have you seen pics of what happens to cheap chinese coolers when you feed decent boost through them? LOL
For $199 it would have to be pipes only OR the shittiest product known to man, you get what you pay for and if you spend that kind of money on a brand new cooler kit I reckon you will end up with a nice paperweight.