deanofay

are the 2003 4.6l and 5.4l exhaust manifolds the same?? They have the same part numbers on the ford website does that therefore make them the same?? and if they are the same will long tube headers for the 5.4l fit a 4.6?? I am asking this because i cannot find long tube headers for 4.6 anywhere!!

60-GUNNER

I'm not sure but I have been wandering the same thing but I found these...

http://www.andysautosport.com/ford/1...s00088032.html

It says they will fit but I'm trying to find out if anybody has ever heard of them or bought them. Looks like we're in the same boat here.

flatheadz-forever

I am very intrested also i am in the same boat as well I heard the 5.4 has a taller deck and that the headers would have to be beaten with a hammer but thats just what i heard hopefully someone on here can clue us in

TheKing1985

Alot of parts are interchangable on the 4.6 and 5.4 but Id do a little more research. You could try looking up the heads, see if they have the same ports and what not.

60-GUNNER

has anyone here found out any info on this? everything i find is mixed reviews

03f1504.6

I'm almost 100% sure they are different the dorman part numbers are different I know for a fact but the last time I looked summit raceing had long tubes for the 4.6

60-GUNNER

[QUOTE=03f1504.6;2577171]I'm almost 100% sure they are different the dorman part numbers are different I know for a fact but the last time I looked summit raceing had long tubes for the 4.6[/QU


for 4WD? do you have a link? all i could find was 5.4l and 2WD

60DRB

The two engines headers ARE different. Something about cylinder head angles, etc. I know of only two places that make them. Stainlessworks ($$$$$$$$), and Pacesetter, which has a couple versions, both a lot cheaper but not SS (which matters to those in the areas where salt/corrosion issues exist).


http://www.stainlessworks.net/2004-0...ead-pipes.html

http://www.lmperformance.com/15954/52.html