Quote:

It's all back together ,machined flat,cleaned both surfaces with brake clean,coated the manifold with copper spray. And the ace-in-the-hole, I added 2 5/16"X24 studs between the center ports on the top and bottom of the flange.(does best Homer Simpson "There,take that.")



all turbo exhaust manifolds should have two modifications. Slightly larger bolt holes for extra room due to heat expansion. where possible split the flange between the cylinders for the same reasons.
Gasket blowout becasue the mating surfaces are not flush or even close in many cases. Most convention header leaks come from uneven surface on their flages.
There half a biilon cars on the globe without gaskets. Every S/B Chevy is a good example. on cast factory manifolds we always surface them to insure a good seal..

home of the
Sox and Martin Hemi Duster