They only sound shit because most people do them up too tight, and they squeak at the slightest throttle closure.

With a big turbo and lots of boost they actually sound good, and they are reliable, unlike some of the other Australian produced rubbish on the market.

wrx-sti, if your SSQV leaks, then obviously its not done up tight enough....mine has been running big boost with no problems, and i know people who have run way way more than 18 psi on SSQVs without a problem.