I have had my HKS on for about 2 months now and I've noticed that sometimes when I'm slowing down or coming to a stop, there's a slight popping sound coming from the exhaust. It almost sounds like my car's back-firing but just not as loud. Has anyone else had this problem? If so, is there a solution? Thanks in advance.

 

No one can help??

 

it means your exhaust have good flow... don't worry about it... it's not a bad thing...

 

I've heard something like that when I had someone rev the engine for me a little bit while I was standing behind the car... but I don't remember ever hearing it from inside the car.