[bradsr1]

OK you dont have a PC111, so thats cant be it and it would have been my first guess, so next what grade fuel are you running. If your not running atleast 91 octane maybe thats it, if you are then maybe you got some bad fuel, Try either draining the fuel or run it out then fill it up with some quality 91 or 93 octane, I run amaco. Just my 2 cents, any one else?

 

[bradsr1]

I think most aftermarket slip-ons do that. My Micron does that also. I like it!!! :rock Mine shoots out a bluish flame when it pops. I heard if you want to get rid of it then get yourself a Power Commander and get it mapped.

This is true a lot of slip ons do this but if its abnormal, and has not done it before, could be the fuel:dunno