So I finally have all of my Hahn exhaust in (block start to muffler). To start if anyone is wondering this **** is AMAZING, nothing else even compares. I have a couple questions though. I may have an exhaust leak on it might just be the sound of my motor. Does Hahn exhaust make it easier to hear the motor? I have had a leak before and this doesn't really sound like one. Also who had problems with fitment of the header with the coolant piping behind the motor? mine is touching by I don't think there is much if an force on it. Let me know what you think and that noise thanks

 

as soon as you put on a header, you will hear more valvetrain noise etc as the thinner walls of the header do not suppress the engines sound as well as thick cast iron.

 

Okay, that was kinda what I was thinking cause I have had a leak before on my zzp setup and this is a different sound. Sounds more like the engine. Maybe I will get under and take a close look but I think your right on this one