Its usually at "highway cruising" speeds... 70-80mph. Its not annoying but whenever someone new sits in the back seats they tend to mention it. I already have plans for using a sound damping material of some sort when I get home.

 

SS Fan, I've probably asked before (because I'm fascinated with your dual exhaust and WANT IT!) but 1) are those Ansa Silverline mufflers, and 2) did you ever post a film clip so we can hear what it sounds like? Thanks!

 

Wrap the muffler in headder wrap..Like a mummy..