I have a set of those & the raised blue sealing edge comes very close to the inside perimeter of the gasket intake port openings. If the port opening is small(er) enough than the head/intake that it needs to be trimmed I'd use super glue on either side of each pair of ports out toward thebolt holes to glue it solid, trim them them, then with a thin putty knife peel them off & any residual super glue will not be near the port openings & hold it up & cause a leak at the ports. my fav(permatex #2) around the intake ports(both sides of the gasket) and on the water ports in the front & RTV instead of the cork gaskets (front/rear).