Exhaust manifold to head pipe bolts

[azopelnut]

I searched and could not find this ...can anyone tell me what is the size:
length, thickness and thread pitch of the bolts that join the head pipe to the exhaust manifold?

[Bill Hoffmann]

I believe they're M8 x 1.25 x 25mm, but one needs to be 30mm if you use the bracket or brace that ties the flange to the block.

[Bill Hoffmann]

...also, you can get them in stainless steel at almost any hardware store these days, and I would recommend that as well as anti-seize compound on the threads.

Bill

[opelbits]

I find it best to replace them with studs and then use brass nuts. The studs make it much easier to install the pipe and the brass nuts will not seize.

The studs need to stick out a little further than the head of a bolt would, about 15 mm.