I have one fitted to my 350 sounds lovely above 3000 when you put your foot down but at low revs not to much louder than slandered so excellent for motorways imo
got mine secondhand but really it was new only on a car for tuning at abbey.
Don't bother there only going to be around 7" wide all round defiantly not staggered so rubbish on tyre widths and off-set will be around 35 so not really any good