I just got the ZZP mid lent Header/ Downpipe installed and drove out of the parking lot with no problems. after a little while i heard a buzzing noise coming from the car and it started to sound like a civic. i guess its air leaking out from a bad seal? im not sure. any advice or solutions to the problem would be appreciated. thanks

 

the air might be leakin form the flex part.....im having the same problem right now but zzp customer services are amazing..they will help you out...