No one has mentioned it yet, but the coeficient of thermal expansion for stainless steel is almost twice that of cast iron and steel. The HRC manifold is cast stainless steel (original HRC was welded from stainless steel parts). Reliefs would be helpful here. The Star manifold and knock-offs are cast iron. Reliefs are less important here.

Corbin
'95 ESI-T

Now with more power and fewer leaks



Humble servant of the Wiki