Why do we build exhausts

We started to build exhaust  for our own race team because we couldn't find them anywhere.
Other drivers asked us to build an exhaust for their bikes. After that we have started to build exhausts for other amateur drivers for an reasonable price.
We do this just to afford our own race hobby.
So actually exhaust pipe building is a hobby that has gotten out of hand. We make to measure so don't mind asking for possibilities. Anywhere in the world.
Take a look at the examples for the exhausts I have made already.