Sierra 18-70938 Exhaust Manifold Molded HoseSierra replacement exhaust manifold molded hose for Mercruiser Stern Drives. For thermostat housing to port exhaust manifold; Fits MCM/MIE GM V06 & V-8 (305 & 350 CID) engines; Interchangeable with: Mallory; 9-44057; Mercruiser Stern Drive; 32-8066351; Fits: 4.3L-LX ( 1993-96) Design III; 5.0L-LX (1988-95) Design III; 350 Mag-EFI-MPI (1987-1996); 5.7L-LX (1986-96) Design III;