Sierra 18-1976-2 Exhaust Manifold Elbow

• 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

• Fits most Mercruiser V6 and V8 applications; 7 degree (4 O.D. Riser).

  Direct replacement elbow fits many Mercruiser V6 & V8 marine engines with center rise exhaust manifolds.

  This riser is used on most Mercruiser V-6; V-8; and Big Block applications from 1983 to 2002; where a 4 inch outlet riser is used (measured on the I.D. of the hose).OE Replacement: 44354 A3; 807988 A2 Includes all pipe plugs. Used on Manifold Part# sMC5500;MC5505;MC5506;OSC9011; OSC7114B & OSC9745.Use with Manifold (18-1952-1)(18-1953-1)(18-19571) Riser Gasket (18-0897 restrictor) (18-2849 open) (18-0672 blocked) Mounting Kit (18-8505) 3 Year Warranty.Aftermarket Replacement Use this chart to match other aftermarket part numbers to this part: Osco: 4354 Barr: MC-20-44354 Sierra: 18-1976-1 Aqua Power: 5706 GLM: 51140.18-1976;18-1976-1;18-1976-2. NOTE:Replaces OEM part # MERCURY MARINE 44354A3 MERCURY MARINE 807988A2 For: most Mercruiser V-6 & V-8 applications 7° (4 O.D. Riser) Comes with 18-0897;18-4263 & 18-4258 Use with: Manifold: 18-1952-1; 18-1953-1; 18-1957-1 Riser Gasket: 18-0897 restrictor; 18-2849 open; 18-0672 blocked Mounting Kit: 18-8505; or if spacer is included use 18-8555

  Fits most Mercruiser V6 and V8 applications; 7 degree (4 O.D. Riser). Recommended for saltwater applications.

  Comes with:

  • Sierra 18-4203
  • Sierra 18-0897 Exhaust Elbow Gasket
  • Sierra 18-4258 Pipe Plug

  • Replaces:

    • Barr
      • MC-20-44354
      • • GLM
          • 51140
          • • Mallory
              • 9-40559
              • • Mercruiser
                  • 44354A3
                  • 807914A1
                  • 44354A9
                  • 44354A10
                  • 44354A13
                  • 807988A2
                  • 807988A03
                  • • Osco
                      • 4354

                      • • For use with:

                          • Manifolds
                            • 18-1952-1
                            • 18-1953-2
                            • 18-1957-1
                            • • Exhaust Elbow Gaskets
                                • 18-0672
                                • 18-0897
                                • 18-2849-1
                                • 18-2849-9-1