Mercruiser GM V8 Small Block Exhaust Manifold | Barr Marine MC-1-87114 Cast iron center rise exhaust manifold fits Mercruiser 898R, 228R, & 260R marine engines. Barr Mercruiser exhaust manifold Direct replacement Mercruiser GM V8 small block center rise exhaust manifold For Mercruiser V8 small block 305, 350, 377 and 383 cu. in. engines Interchangable between port and starboard side Includes gaskets and mounting hardware Heavy duty cast iron Painted black Replaces Barr MC1-87114 Replaces Mercruiser 860246A15, 860246A10, 860246A9, 860246A7, 860246A3, 860337A2, 87114A30, 860246A9, 860246A3, 87114A19, 87114A8, and 860336A2 Replaces Osco 7114B2