Sierra 18-1953-4P Complete Exhaust Set for Mercruiser Small Block V8

Everything you need to refit your small block MerCruiser 5.0L or 5.7L engine with new exhaust manifolds and risers.

• Mercruiser exhaust manifold
• Direct replacement manifold fits Mercruiser GM V8 305, 350, 377, and 383 cu. in. engines with center riser
• For Mercruiser 898R, 228R, & 260R model engines
• Interchangeable between port and starboard side
• Heavy duty cast iron
• Painted black
• Includes all gaskets, manifold mounting bolts, drain elbow, and plugs
• Manifold mounting kit P/N 18-8520 – sold separately
• Replaces Mercruiser 860336A2, 87114A8, 87114A19, 860246A3, 860246A9, 87114A30, 860337A2, 860246A7, 860246A10, 860246A15
• Replaces Osco 7114B2
• Replaces Sierra 18-1953, 18-1953-1

• Sierra 4 inch exhaust elbow
• Fits most Mercruiser V6 & V8 applications
• Accepts 4 in. inside diameter exhaust hose
• Cast iron construction
• Includes 18-0897 gasket, 18-4263 pipe plug, and 18-4258 pipe plug
• Replaces Mercury 44354A3, 807914A1, 807988A2 and 807988A03
• Replaces Osco 4354
• Replaces Sierra 18-1976 and 18-1976-1

Complete exhaust manifold and riser set for Mercruiser small block GM V8 engines. Kit Includes: 2 Cast Iron Center Rise Exhaust Manifolds 2 4" Exhaust Elbows 2 manifold gaskets and 2 riser gaskets Mercruiser V8 305/350 Small Block Exhaust package complete with 4" Center Risers, Manifolds and Raw Water Cooled Gaskets. NOTE: Includes: (2) Sierra 18-1953 Manifolds (2) Sierra 18-1976 Risers (2) Sierra 18-0872 Manifold Gaskets (2) Sierra 18-0897 raw water cooled riser gaskets.