The Ford Barn

Mr meteor · 07-26-2025, 01:22 PM

I am assembling an 8BA and I recently acquired some used exhaust manifolds and a crossover pipe.

I am shopping for the correct fasteners to attach these to the block. I’m finding a lot of bolts but not a lot of options for studs.

The header bolts I keep finding are marketed for the 8BA but seem to be 1 inch and I believe the holes in the block are 1 1/8.

Does anyone know where to source studs? Or is it ok to use these bolts?

Karl Wolf · 07-26-2025, 02:26 PM

The two forward bolt holes are 7/16", the center and rears are 3/8".
I used studs with brass nuts.
Bolts will work, but make sure that they do not bottom out at the bottom of the holes before they tighten the manifold.

Karl

ford38v8 · 07-26-2025, 03:56 PM

Karl Wolf's advice is right on. Follow his advice to the letter.

mcgarrett · 07-26-2025, 04:11 PM

Third Gen has this kit. Give them a call or email to make sure they will work for your application.

https://thirdgenauto.com/product/193...lock-hardware/

Mr meteor · 07-31-2025, 02:01 PM

Thanks everyone for the great advice. Looks like bolts are an ok option so I’ll probably do that.

Mart · 07-31-2025, 02:36 PM

Sponsored Links (Register now to hide all advertisements)

Bolts were the factory fitment. French blocks used studs.

07-26-2025, 01:22 PM	#1
Mr meteor Junior Member Join Date: Jun 2025 Posts: 15	Newbie question studs or bolts on exhaust manifold I am assembling an 8BA and I recently acquired some used exhaust manifolds and a crossover pipe. I am shopping for the correct fasteners to attach these to the block. I’m finding a lot of bolts but not a lot of options for studs. The header bolts I keep finding are marketed for the 8BA but seem to be 1 inch and I believe the holes in the block are 1 1/8. Does anyone know where to source studs? Or is it ok to use these bolts?

07-26-2025, 02:26 PM	#2
Karl Wolf Senior Member Join Date: May 2010 Location: Mill Valley,Ca. Posts: 1,539	Re: Newbie question studs or bolts on exhaust manifold The two forward bolt holes are 7/16", the center and rears are 3/8". I used studs with brass nuts. Bolts will work, but make sure that they do not bottom out at the bottom of the holes before they tighten the manifold. Karl

07-26-2025, 03:56 PM	#3
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 7,285	Re: Newbie question studs or bolts on exhaust manifold Karl Wolf's advice is right on. Follow his advice to the letter. __________________ Alan

07-26-2025, 04:11 PM	#4
mcgarrett Senior Member Join Date: Dec 2013 Location: Corsicana, Texas Posts: 1,306	Re: Newbie question studs or bolts on exhaust manifold Third Gen has this kit. Give them a call or email to make sure they will work for your application. https://thirdgenauto.com/product/193...lock-hardware/

07-31-2025, 02:01 PM	#5
Mr meteor Junior Member Join Date: Jun 2025 Posts: 15	Re: Newbie question studs or bolts on exhaust manifold Thanks everyone for the great advice. Looks like bolts are an ok option so I’ll probably do that.

07-31-2025, 02:36 PM	#6
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 9,088	Re: Newbie question studs or bolts on exhaust manifold Sponsored Links (Register now to hide all advertisements) Bolts were the factory fitment. French blocks used studs.