well im going to built a 2FE, and want to know if any of you guys with 3FE's have any type of header and does it make a big dif from what you could tell, my 40 came with one so i do know with mine.
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dd113 said:Some advantage but not worth it when installing on a motor in a truck. if you are rebuilding/pulling the motor it could be worth +- 25hp. Get the ceramic coated one and be supercareful sealing it up.
Moby said:I ran the Man-a-fre headers on my 3FE for a little over a year. I spent the entire time trying to get them not to leak at the collectors (including multiple trips to a good exhaust shop). Finally I was about to cut the collectors off and weld in a ball-socket connector but Man-a-Fre agreed to take them back. This was really above and beyond on their part and I've gone back to them to buy other parts that I could have bought locally as my way of saying thanks.
The power gain was a little noticable on the top end (full throttle highway merging for example). I'm currently running the stock manifold (ceramic coated) and a custom exhaust from the manifolds back. I've got a flex joints in both pipes, a single dual entry dual exit high flow cat, and a dual entry single exit Flowmaster. This set up works very well and does give a noticeable gain in power (at least on an engine in decent shape and in good tune).
HTH,
Joel
FJ40onNOS said:well im building a 2fe with is a 2f block on a 3fe head