I went to the dragstrip tonight and after my last run I noticed a funny pinging/knocking like sound coming from the passenger side header valve cover area. My exhaust is so loud I can't really tell where exactly the sound is coming from. It sounds like someone is inside my header hitting it with a wrench. It runs fine though, no loss of power, actually ran my best time of the night on my final run, and drove and hour back home and no problems. I'm hoping that maybe I just have a collector bolt or something loose. Just trying to get some ideas on where to look first.

Thanks

 

Mine made a loud tapping noise when I spun a rod bearing...hope thats not the problem.
Bill