welded on piping already both work perfect and have small scratches on them hardly noticable . want totrade them for TWO OTHER bov's with piping( turbo xs, greddy, whatever ) or sell them for 280 obo or 140ea. just paid 550 for the kit on EBAY ..came off a 300zx, used for about 3k miles . pics up in a lil if any ones interested..