Description

Sierra’s 18-1903 Manifold is designed for use in GM Small Block V8 (305-350 CID) (1979-1989) engines. Designed for installation on the port side. Use with Sierra’s 18-1921 Manifold Elbow, 18-2949 Exhaust Manifold Gasket, 18-8502 Exhaust Manifold Mounting Kit, 18-2902-1 Exhaust Manifold Gasket, and 18-2902-1-9 Exhaust Manifold Gasket. The manifold comes with (1) Sierra 18-0943-2 Exhaust Elbow Gasket, (1) Sierra 18-2949 Exhaust Manifold Gasket, (1) Sierra 18-7306 Hose Clamp, and (1) Sierra 18-0550 Plug Off Cap. Interchangeable with Mallory 9-40601, GLM 51420, Barr OMC-1-912442, Osco 2442, and OMC Stern Drive 912442. Check manufacturer recommendations to ensure a proper fit before purchasing. Each Sierra product meets or exceeds the original equipment part it replaces.
Designed for use in GM Small Block V8 (305-350 CID) (1979-1989) engines
Designed for installation on the port side
See long description for list of included components
Interchangeable with Mallory 9-40601, GLM 51420, Barr OMC-1-912442, Osco 2442, and OMC Stern Drive 912442
Check manufacturer recommendations to ensure a proper fit before purchasing