[ted]

Yep seen a bunch of inventive exhaust pipe appendages added to divert the noise away from the sound booth.
I despise the whole culture of sound restriction devices on race cars at Laguna Seca.
My car with a big muffler did 115db, so I gave up and just run no muffler now.

You put a muffler with too much back pressure on a 700hp engine it kills power and creates lots of heat.
So much so my buddy melted a battery from the increased heat.
Another guy had a side exhaust with a turn down on it.
It hooked another race car on the front straight and spun them both off.