well its the gibson single swept side. it looks to be 2.5 and its just whatever muffler gibson uses with thier kit.
i think it sounds good, its no V8 by anymeans but it definatly doesnt sound anything like a 4cly doesnt have that Waaaaam sound. it just has a little bass and sounds "smooth". on the freeway at like 80 it does start to get a slight droan but only if you have the windows up and no raido.
heres a video of i
and it compars stock to the gibson to the gibson with the muffler flipped around backwards to the way they send it. so the word gibson reads opposing the exhaust flow.