saw these on ebay and they look ok, i know theyre knock offs, but do you think that they would be any better than a OEM header on a B18C?

http://cgi.ebay.com/ebaymotors/ws/eB...tem=1854625815

and secondly..this one doesnt look right, the 4 branchs go straight to 1 in the same place as 4-2-1 header branches from 4 to 2...would that not leave it more restrictive?

http://cgi.ebay.com/ebaymotors/ws/eB...tem=1854623751