Anyone know how to tell the diffence... 1F/2F exhaust gasket?

[cdv3286]

I have a 71 FJ40 with headers that I just acquired... it has a set of headers and an exhaust leak. In my parts from the cruisers I have had over the years I have two exhaust gaskets... does anyone know how to tell what they fit? 1F/2F? Is there a difference between gaskets for the stock manifold vs a header?

Thanks for the help!

 

[35inchoverdrive]

I *think* the F/2F gaskets are the same, but someone will be posting up to tell me if I'm an idiot or not any minute. I do know that the stock manifold gasket will work with a header though.

 

[FJ40 TOOLMAN]

Remflex shows the same part number

 

[DSRTRDR]

Is there a difference between gaskets for the stock manifold vs a header?

no

one difference is that the OEM gasket has metal on the sides, aftermarket not

 

[cdv3286]

Thanks guys... btw...what is remflex?

 

[65swb45]

1. If you are looking at STOCK manifold gaskets, the holes for the manifold bolts will be larger on the 2F than the F. Not so with aftermarket [they all have the larger 12mm holes]

2. If you are looking at MOST header gaskets, they are made of a single kevlar composite, no steel facing or steel port rings. IMO, junk.

3. I don't recommend EITHER of those choices for a header install.

If you have more time than money, and don't mind doing the job over again when it leaks, carry on. Otherwise, a little thread searching for header gasket choices may yield other options.

Best

Mark A.