Man-A-Fre headers on 3FE

[FJ80Chick]

Anyone used headers on a 91 FJ80 with a 3FE with any noticeable HP differences or mileage change?? Also, any other companies supplying these other than Man-A-Fre?

Any input is appreciated!

Thanks!

 

[lt1fire]

i was wondering the same thing... anyone here had them on a 3FE

 

[alkaline747trio]

I have heard the leak/fitment issues outweigh any performance they give.

 

[motorsargeT]

I have them on my 91 and would not recommend them. Maybe I got a bad set but mine had pinhiles in just about every weld which I fixed. shortly after that they developed a leak at the collectors. Fixed that and now the manifold gasket is leaking between cyl. 2 and 3 exhaust. I also had to stretch out a couple of the bolt holes to get them to fit.

I installed these on a freshly rebuilt engine with the head machined flat so i know the surface is ok. I can't comment on the power increase because the compression was bumped and the head portd during the rebuild. I can say that when I pull the headers off to fix the manifold gasket leak the stock manifolds are going back on.

 

[lowtops]

motorsarge,
Are these the same headers that you bought through MAF?

http://www.tpi4x4.com/3FEHeaders.html

I have been wanting these for some time now. I keep hearing two different stories on 3FE headers. I may just have to find out for myself.

 

[motorsargeT]

They look identical to the one I have. Can't say for sure if they are the same manufacturer or not.

 

[FJ80Chick]

Thanks for the input - I'll keep that in mind before I spend the dough!!!

 

[Moby]

I have them on my 91 and would not recommend them. Maybe I got a bad set but mine had pinhiles in just about every weld which I fixed. shortly after that they developed a leak at the collectors. Fixed that and now the manifold gasket is leaking between cyl. 2 and 3 exhaust. I also had to stretch out a couple of the bolt holes to get them to fit.

I installed these on a freshly rebuilt engine with the head machined flat so i know the surface is ok. I can't comment on the power increase because the compression was bumped and the head portd during the rebuild. I can say that when I pull the headers off to fix the manifold gasket leak the stock manifolds are going back on.

I'll second this. My set leaked at both collector flanges from day one (they were clearly warped). Tried everything to get them not to leak. I was just about to have the exhaust shop that did all my exhaust cut the flanges off and go to a ball/socket design when Man-a-fre offered to take them back. After putting the stock manifolds back on I realized that the headers offered some perf gain, particularly at full throttle/higher rpms, but not enough to warrant the price in my opinion.

 

[Cruiser Jimmy]

you could stroke the crank with a 2F lower half, bore the cylinder back to 3F size, port and polish the engine, balance/blueprint and adjust the MAF and it should walk away from a 1FZ. But that's more pesos than you really want to spend just for a 3FE.