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The sleek Permastar finish on the RPM Air-Gap intake manifold (PN 75012) is unaffected by heat and all corrosive solutions. Further, it includes rear water outlets, two distributor clamp locations, and bosses for nitrous nozzles. John put it to bed with Edelbrock 7201 gaskets and ran the proper torque sequence. Then he installed the 180-degree thermostat under the new water neck.