Originally Posted by Mike Benvo
I haven't really been following.. are there any links on what this 'mod' does?
I assume it's opening the stock exhaust up, making some changes inside, and then welding back together?
I have a similar mod, too, which sounds great. The muffler was opened, replaced perforated pipes by closed ones apart from a very short piece which was left perforated. Sound dampening material is still there and the Hemholtz chambers still work (reducing drone, there is none at all).
Sound is only a bit louder on the inside but way louder on the outside and it sounds great. Turning heads even at the Nürburgring where people are used to hear loud cars
Idle during cold start is 94db(A), idle with warm engine 74 db(A) and full acceleration (on dyno) is 116 db(A). Measured at 45 deg angle, 1m distance to exhaust tips.