Sierra International INTAKE Manifold Gasket Set 18-4388 INTAKE Manifold Gasket Set Fits: mcm 175 185 205 4.3L/LX w/1 pc. Rear main seal (1985-1993) Glm 39650, mallory, 9-61210, mercruiser stern drive 27-11977a92, 27-11977a88 Includes: 18-3879 head gasket Backed by sierra's industry leading Warranty