Proflow's ProSeal intake gasket kits include a blue bead of a special elastomer around the ports for extra sealing power. They also feature a non-metallic, rubber-fiber base material that resists gasoline and alcohol, while allowing engine builders to precision-trim around the intake ports.

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Proflow Master Cylinder, Universal GM, Raised Top Aluminium, Black, 1.00 in. Bore, Dual Bowl, Ports Both side, Each

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