Originally Posted by UK-Wagon
Could have been a intercooler hose popping off, but you would be able to notice that now if that were the case. So it was more likely a big backfire from improper tune/timing. If that is the case..... id be asking for my money back and finding a new tuner.
Your reading comprehension score must have been on the low side. He has an OTS tune from TP. That map did not cause a big backfire due to poor tuning or timing. Most likely he hit boost cut or popped the TB hose.