I've heard it on H's catless WRX,and it was LOUD.I'm hoping on mine,with the gutted stock dp and 3rd cat still there it won't be as bad....I like the sound.I'll give it a try.
You don't know how tempted I am to do it,actually.My 928 would shoot flames sometimes after a hard run,and it was just an n/a V8.I found this out after seeing part of my bumper melted onto the exhaust tip.