That's the biggest load of shit I've ever heard.
How does a screamer pipe give you quicker spool up?
It only works once the turbo has already spooled up and the wastegate has opened, it gives you better top end, yes. But unless you're running 400+ hp, theres no point, especially through the stock turbo.
Less stress on the exhaust wheel? How does an atmo venting wastegate do that?
Crazy sound? it sounds like an exhaust leak.