Fenton Headers
 

What are the correct bolt lengths and sizes for my NOS Fenton headers? Don't want to get into the water jackets

Re: Fenton Headers
 

(4 front) 7/16" 14 x 1-3/16 "
(8 ) 3/8" 16 x 1-1/4" center and rear
Stock bolts but you will have to determine length as the flange
on the Fenton headers may vary in thickness from stock.

Re: Fenton Headers
 

Shouldn’t the left center lower bolt on originals be about an inch longer? I have 4 sets and that bolt is about 1 3/4 longer. I am away from home so can’t check exact lengths

Re: Fenton Headers
 

For Fenton headers ??

Re: Fenton Headers
 

Yes original Fenton Headers. Can post pics when I get home from Moonshine Festival tomorrow.

Re: Fenton Headers
 

https://www.fordbarn.com/forum/attac...0&d=1587224341
These are from an old post. These are mine. I now have 4 really nice sets one NOS. LOOKat the lower left center bolt. These have the Ford part number on them. Old and nice.

Re: Fenton Headers
 

Suppose the long bolt would be correct if the OP indeed has that variation of header, otherwise he would have to determine which length/s are needed.
https://www.fordbarn.com/forum/attac...8&d=1666510056

Re: Fenton Headers
 

Perhaps Driskel can help.

Re: Fenton Headers
 

- First clean all the exhaust manifold holes out.
- Using two long bolts, 3/8 and 7/16"; hand thread them in the block and measure the protrusion under the head or to the outside of the bolt head
- Deduct 1/8" to 1/4" from the insertion length
- add thicknesses of manifold flanges and any washers or lock washers if you plan on using them
- buy or custom cut the bolts to the dimensions you calculated

Re: Fenton Headers
 

The manifold pictured looks like the speedway version of Fenton’s original header. The lower bolt in the center flange is longer.

Re: Fenton Headers
 

Open the picture in my post to see originals with longer bolt needed.

Re: Fenton Headers
 

Looks like there may have been two types of original Fenton's, unless those are re-pops.

Re: Fenton Headers
 

I used studs, and brass nuts...

Karl

Re: Fenton Headers
 

OR these are “THE ORIGINALS “