Can anyone tell me how loud our cars would be running a 35mm wastegate with an open dump pipe (non plumb-back)

Reason for asking is that its going to be a fairly long drive through populated areas to get to the zorst shop to plumb it back for me.

Is it just loud (like a screamin 4 banger) and F$%K-OFF loud like our cars with open headers?

 

It's not nearly as bad as open headers. Just keep your foot out of it, and it'll be quiet enough. Volume, I'd expect the same as open headers w/ a cat, but no catback exhaust.

 

 

It really depends on the predominant frequency range in the exhaust note… Having run cats + 3” pipes and no muffler as well as bullets I’d say that on most cars bullets are much quieter, but there are odd combinations that they will end up louder.

Personally, I find a flowmaster 40 series much more annoying then a bullet…