Originally Posted by gibbo frst
my cometic ones are fine on mine.. with the plenum one i drilled through the threads and bolted right though bolts and lock nuts... has been ok so far..
With the paper and cometic gaskets the key is to bolt through as gibbo says. Otherwise the plenum to inlet manifold bolts "pinch" or "bind-up" and you dont get the full clampimg force throughout the mating surfaces.