Odd issue..?, And small upgrade I bought...

I got one of these banana pipes for 15 cdn. I was thinking of using it to go under the pedal crank and out the back. The diameter is just too narrow to do much. I was thinking with an extended pipe off the motor and modify the angles so it could wrap under the bottom bracket and out along the chain stay would look great but I don't think it would do anything other than look cool.

All that I've read about them as they come isn't great. As IR says modifying the stock pipe is just as well.

Ideally would be good to make at least some simple calculations to make some thing that would at least help.