Port Shape:Rectangular Raised. Intake Manifold Gaskets Series:Ultra Seal. Nitrile rubber and fiber. Will not crack or split and resists wicking. Withstands 600 plus degree temperatures. Silicone bead around the port creates a tight leak proof seal.
Mr Gasket Intake Gasket Set 5834; Ultra-Seal 2.11 x 1.25 in. for SBF
Mr Gasket Intake Gasket Set 121; Performance Composite, 2.55 x 1.85 in. for BBC
Mr Gasket Intake Gasket Set 108; Performance 2.5 x 1.75 in. Rect Port for BBC
Mr Gasket Intake Gasket Set 5818; Ultra-Seal, Rectangle 2.5 x 1.75 in. for BBC
Mr Gasket Intake Gasket Set 143; Performance Composite 2.26 x 1.35 in. for SBC
Mr Gasket Intake Gasket 211; Performance Cellulose/Nitrile for Ford 351C 2V
