Hey Fabo! I'm getting a lot of advice here lately....how about this. A diesel mechanic here in town claims that an exhaust manifold will move less with no gasket (assuming head flange & manifold flange optimum true-ness) After having my manifolds shaved off by .250 he says they will probably crack but my best chance is to Not use a gasket to eliminate movement which in turn causes the cracking to appear.. I am using the conical washers on the inside two ports to help distribute the load around bolt holes. 318 with '92 Dakota manifolds What say ye?