I could not agree more that stock exhaust manifolds are much different than performance headers and to take it a bit further stock manifolds alone run the gamit of different levels of realized performance enhancements. But what I was looking for was an opionion of the exhaust header/manifold that I had linked to and the other types of header/manifolds such as Borla, Thorly, Banks etc. Here are few more links, see the resemblance? Any change in your opinion? Do you think the header at Auto Parts Network is a good deal for the performance vs. $$ ?
Thanks.
http://www.autopn.com/store/pc/viewprd.asp?idProduct=20009
http://www.prostreetonline.com/buy/borla%5Fexhaust%5Fheader/jeep/
http://www.rocky-road.com/xjthorley.html
http://www.bankspower.com/System.cfm?appid=AJ01&sysid=SJ01


78 CJ7, 83 wide track axles/Dana 30 Front W/ OX Locker, Model 20 rear w/ one piece shafts(welded tubes)/Detroit Locker, 4.10 gears. 4.5" spring lift with 3/4" shackle lift. 35x12.50 BFG MT, 4.2L, Weber Carb, K&N, T18,Scout Dana 300,Warn 9.5ti