GM LS Rectangle Intake O-Ring Gasket Set AF6233-6002GM LS Rectangle Intake O Ring Gasket SetSuit LS3 engines, 8 Piece Set AF6233 6002 6233 6002 These replacement intake O ring gaskets are specifically designed to suit our GM LS sheet metal fabricated intake manifolds. These are included in the intake manifold kit AF6233 6000 intake manifolds. The 8 piece O ring kit will also suit all GM LS intakes with rectangle port o ring gaskets.