It is 14" long, and roughly 4"x8" oval I think. A little smaller than the magnaflow(so probably a little louder).
It is actually a nice piece, all 304 SS inside and out, the welds seem ok, only thing is it's made in china which I didn't realize when I bought it. If I had known I wouldn't have bought it probably. In any case I have it and it seems like a good piece. Hell of a deal for less than $40.