MerCruiser 4 Cylinder 153 Model 120 Exhaust Manifold Replaces B-63122A1 

Direct replacement water cooled exhaust manifold.

Replaces MerCruiser 63122A13 and Sierra 18-1959.

Fits MerCruiser 4 cylinder 153 C.I.D. 120 H.P., Model 120 engine (log style direct replacement).

Barr Marine castings have a thicker interior wall, are painted to match original manufacturer colors and are packed in foam for added protection during shipping and storage. Barr manifolds and exhaust connectors are designed to minimize back pressure, and in many cases more r.p.m.'s are achieved after replacing an OEM manifold with Barr replacement parts.

• Replaces MerCruiser part # B-63122A1.
• Includes all plugs, gaskets and mounting hardware to the cylinder head.
• 3 year limited warranty on Barr exhaust manifolds, risers and exhaust connectors (1 year when used for commercial purposes).

Compatible parts:

• MC-20-55538 direct replacement exhaust elbow/ riser.
• 1-47638 direct replacement exhaust manifold end cap/connector (front).
• 1-47638P exhaust manifold end cap/connector (front) mounting package.
• MC-1-35898P intake manifold mounting package.
• MC-1-63122P exhaust manifold mounting package.
• MC-20-55538P riser to exhaust manifold mounting package.
• MC-29-47587 direct replacement lower thermostat housing.
• MC-29-60372 direct replacement upper thermostat housing.
• MC47-27-35898 direct replacement intake manifold gasket.
• MC47-27-35898A4 exhaust manifold gasket set.
• MC47-27-39915 direct replacement exhaust manifold to exhaust elbow gasket.
• MC47-27-39923 direct replacement exhaust manifold end cap gasket.

Manufactured by Barr Marine. Part number MC-1-63122.