I have had my 1999 cr 125 for about a month now. I have a pc pipe and silencer on it now but the pipe is kinda beat. Has some dings, nothing big but is still robbing power. I was wondering how are bills pipes for dirtbikes. How do they sound, hp gains, how loud compared to pc and fmf is it?

 

I have a Bills Pipe on my RM250 and it's a great pipe. High quality, fit & finish and the power gain was very good over the stock pipe.