I was under my truck today waiting for the oil to drain I was taking a look at the exhaust. I am the third owner (second guy had it for a month) so I am finding things as I go, I was looking at the mid pipes and muffler ect they look like they are stainless, a little discolored at the manifold but have a hi flow cat welded in and looks like tig welded flanges to pipes with no second set of cats and a muffler with a strange 2 step pipe bolt up, one farther out then the other, so I was looking on the net and seems like this is a b&b setup, am I correct? If so, is there any thing I should look for as far as a label? Also what is the best way to clean it up , if it is stainless? or should I not bother? And is this a good setup? thanks