Barr MC-1-47736 Starboard side Exhaust Manifold with Rectangular bolt pattern riser for GM Mercruiser big block. Replaces Mercruiser B-47736A. Fits Mercruiser models: 325, 330, 350, 370, & 400 INBOARD UNITS. Includes manifold to head gasket and mounting bolts, endplate gaskets, and raw water cooled riser gaskets.
NOTE: Riser to manifold bolt pattern is "RECTANGULAR" 2-3/4" x 4-1/2". Made in USA, 3-year limited warranty.