I've had my stage 2 map a month now . Nick at r-tech done it made 360hp 356 torques while there I asked I'm if he'd be able to make it pop and bang he said its very difficult for these engines to do so. Even though I have a decat and non res exhaust.
As Karl said when its cold it will pop slightly but stops after about 2 mins :-/. If you drive it hard when it's fully warned up you'll get a couple of pops when changing gear nothing special :-/
A friend has a vxr with de-cat and straight through exhaust, now that's a car you need if you want pops and bangs.