So I guess Im gonna fix up this altima with some mods. Now is there really any difference between these header?

http://cgi.ebay.com/ebaymotors/Perfo...spagenameZWDVW

http://cgi.ebay.com/ebaymotors/Nissa...spagenameZWDVW

http://cgi.ebay.com/ebaymotors/OBX-9...spagenameZWDVW