Those Borla headers would work better with "merge collectors".
Do you mean this?
http://s159.photobucket.com/user/BMXPETE/media/Borla/100_1352_zpskhqjuxb2.jpg.html?o=3I got this with the headers.
Also non-magnetic, so 409 stainless steel too?
I'm assuming Borla supplied with headers.