The tailpipe is oval and fits the bumper cut-out perfectly.
I think the boxes are stainless, not 100%sure whether the tube is stainless, id assume so.
There's a c.4" crack in the centre box hence the price of £30 collected from Southam, warwickshire. Ideally would be great to cut the backbox off, flare the end and could easily fit a standard centre section.
Not noisy at all but gives a nice sound.
Any questions then feel free to pm me