just for the heck of it tonite i was speeding through my gears. I believe it was my end of 2nd or middle end of 3rd i heard a loud pop. Maybe backfire? What caused this? I know this happened to me when my car was all stock before too and now i have Tp and exhaust.

 

so much info, how could someone not be able to diagnose that?

 

Probably just backfire. Since you have exhaust combined with the test pipes. Less restriciton to the exhaust from the cats.

 

thats not backfire, thats caused by fuel being dumped when you shift. its normal if your not finely tuned, allabit annoying. I can't stand it personally.