[CrackedCranium]

I am looking to put a header on my fj62 with a 3F engine.
I understand the the 3F requires 2 o2 sensors for the ecm,
but my question is will the 2f header bolt to the 3f head?

[rfj62]

You can't put 2F headers on a 3F engine, you can however get 3F headers from TPI and Man-a-fre.

Check out this thread on wiring O2 sensors together.
http://forum.ih8mud.com/60-series-wa...ight-fire.html

[RockDoc]

Common wisdom is that the manifolds on a 3FE perform well....... Are you having issues with them?

[CrackedCranium]

no just looking to put on a simpler exhaust.

[Mark W]

Run the twin head pipes into a single and install O2 sensors just downstream from the exhaust manifolds a little... before joining the head pipes into one. One you join the head pipes into one, run it (with 2.5 inch pipe) inside the frame with a single cat and muffler


Simple and effective and inexpensive.


Mark...

[rfj62]

Originally Posted by RockDoc

Common wisdom is that the manifolds on a 3FE perform well....... Are you having issues with them?

Yeah, I would stick with the stock manifolds also.

[pappy]

Originally Posted by Mark W

Run the twin head pipes into a single and install O2 sensors just downstream from the exhaust manifolds a little... before joining the head pipes into one. One you join the head pipes into one, run it (with 2.5 inch pipe) inside the frame with a single cat and muffler


Simple and effective and inexpensive.


Mark...

I agree with Mark. The 3FE manifolds work just dandy. I just happen to have the exhaust out of my truck. Pic isn't very good because I had to straddle a bunch of junk to get the shot. But it does show what Mark was suggesting.

[SHERMAN FJ62]

I have been told you need to stick with the manifold on the 3fe because they will blow the gaskets out on the headers. They also do not offer preformance boost

[CrackedCranium]

thanks very much for all the advice,

[rfj62]

Do you have them coated with something, like a exhaust paint?

Originally Posted by pappy

I agree with Mark. The 3FE manifolds work just dandy. I just happen to have the exhaust out of my truck. Pic isn't very good because I had to straddle a bunch of junk to get the shot. But it does show what Mark was suggesting.

[pappy]

The manifolds? IIRC, they were powder coated with a high temp powder by the engine builder. The pipes were not.