hi i have a 04 xb12r and lately have been noticing a rattling noise on decel noise sounds as if its coming from the inside of the header so im thinking pinging or shits hitin the fan in there and today i noticed while i was trying to figure out the noise my header was glowin red hot you could see it wit the lights on a lil but when the lights were off it was very noticeable wondering if thats normal which i doubt but hey minds well ask