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?

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

Re: Newbie question studs or bolts on exhaust manifold
 

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

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/

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.

Re: Newbie question studs or bolts on exhaust manifold
 

Bolts were the factory fitment. French blocks used studs.