Racing beat megaphone

[Whizbang]

has anyone used this thing before?

Collector/Megaphone Assembly

Our Collector Megaphone Assembly is designed specifically for high output race engines. The pipe diameter is adequate for up to 300 horsepower - the inlet pipes are 2-inch O.D. and the outlet diameter is approximately 4 inches. Overall length is approximately 35 inches.

4" outlet seems a bit larger from what i have seen used for standard exhausts. Most of the people running a megaphone tend to leave out details on their setup. Just curious how well something like this might work. And were the hell i would fit 4" diameter piping....