The only thing removed was the Two Mufflers under the car and replaced with these Cherry Bomb style ones made by FlowTECH and these have Louvers rather then perforated steel on the inside.
As for sound during idle its exactly like stock soundwise.
Under Normal street driving it sounds deep and a little agressive and the closest thing that compares is my friends E36 M3 with stock system except mine is just a tad bit louder.
On the 70mph/120kph I think its almost like stock but you can hear it enogh to tell that its different, but not loud enough to make the ride unpleasant.
And if you were to run up through the RPMs it sounds much louder but still nice, I ran all the way up to 6000RPM and in fact it seemed like the engine made more noise but it sounds bad ass between 3000-5000 under load! I got a few people to turn heads as i passed them.
I would recommend that to anyone interested in confusing the hell out of people because a sound like that is only expected out of cars in much higher class at least in my opinion.
