This retails at around £150 according to website. I cant lie, its not suitable for a williams which is what I have, I bought it off a member on here who thought it might go on williams, possibly with a sleeve. It doesnt, willy exhaust very different...so yes, magnex stainless steel backbox, 3 inch tailpipe.....photos on request...all looks very clean... Im looking for £50 incl postage n packaging..