I have a 2011 Honda Civic Ex Sedan currently at the moment and I have recently just put a muffler on it. However its a Skunk2 Muffler and it pops but I don't know why its popping is a bad thing or is because my car is able to breathe a little, however, I was told the popping was a bad sign and I was wondering if you guys have any clue or it is just normal. it usually happens when I'm at around 6200
RPM's in 1st and shift to 2nd and hit the 4500-5000 RPM's range is usually when it happens.
I know this sounds kinda confusing but I was just wondering.