ARK
I bought one of your earlier model, single tip. Since I install it, I have run it for only around 2000 miles. The problem that I have is that:- the sound of the exhaust varies from time to time, i.e sometimes, it sound smooth and powerful, sometimes it sounds terrible and is just noisy without any sign of power (it is like a bubbling thru the pipe). Is there anything that I can check and do to correct this?