Thinner-style header gasket. Fits Opel GT, Manta, Ascona and Kadett models with 1.9L and 2.0L Opel CIH style engines. Recommended in many cases with our #10023SS "Shorty" Opel header or our #10024SS Opel GT header. An inexpensive optional design gasket, best when installed with intake and exhaust flange surfaces are mostly even and flat.