Hi all, recently I installed headers and a high flow cat. Just today I installed a cat-back system. The headers are Edelbrock as well as the cat back with a Carsound cat. OK!. now when I rev and let off the gas, I'm getting popping sounds or possibly backfire when I let off the pedal. Is this normal? or What can I do about it? THX

 

thats normal, and perfectly fine

 

That can also be from, exhaust leaks, go over the whole system and check for any.

 

The sounds you are experiencing are from a lean fuel mixture which typically happens when exhaust improvements are made.

Put a little more fuel in it if possible.

www.geocities.com/dzperf