BRemflex RF13-002 Graphite Exhaust Manifold Gasket ReviewbP PP Remflex RF13-002 Graphite Exhaust Manifold Gasket PSquare ports measure 1-932" x 1-3132"PFills gaps in the flange surface up to 116"PDoes not burn, shrink or leakPEliminates the need to re-torquePImproves fuel efficiencyP