OMC Exhaust Manifolds

      • Sierra 18-4218 Drain Tap Replaces 22-16951Q1
        List Price: $9.99
        Starting At: $6.55

        Sierra 18-4218 Drain Tap for Mercruiser, Volvo, OMC Sierra high-quality engine parts are designed to meet OEM specifications. Used with most OEM Manifolds. Fits Mercruiser cylinder blocks & exhaust manifolds Material: Brass Size: 1/4"...

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      • Exhaust Manifold Gasket , Mercury - Mercruiser 27-33395
        List Price: $9.52
        Starting At: $7.93

        Exhaust Manifold Gasket , Mercury - Mercruiser 27-33395 Fits MCM/MIE GM V-8 (283, 305, 350,  and 377 CID) engines Replaces: GLM 31100 Mallory 9-61401 Felpro 17420 OMC 3852468 Redline RL0872 Sierra 18-0872

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      • Sierra 18-0549 Plug Off Cap Replaces 3852476
        List Price: $10.98
        Starting At: $7.84

        Sierra 18-0549 Plug Off Cap 1" I.D. Sierra high quality engine parts are designed to meet OEM specifications. For V8 Stern Drives and Inboards 1977 - present. Interchangeable with: GLM 22290 Johnson/Evinrude...

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      • Sierra 18-1998-1 Exhaust Manifold
        List Price: $292.49
        Starting At: $204.49

        Exhaust Manifold - Port & Starboard for Ford V8 Engines by Sierra Fits Port and Starboard Sides. Universal Center Riser Manifold. Use With: Exhaust Manifold Gasket: 18-0183 Exhaust Manifold Gasket Set: 18-0603 Exhaust Manifold Mounting Kit: 18-8538...

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      • Sierra 18-1997-1 Exhaust Manifold
        List Price: $281.49
        Starting At: $162.95

        Universal Exhaust Manifold with Mounting Package by Sierra For Port & Starboard Sides. Universal Center Riser Manifold. Fits: Chriscraft 283, 302, 307, and 350 CID Engines. Crusader 283 and 327 CID Engines thru 1964; 305, 307 and 350 CID Engines 1965...

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      • Sierra 18-0604 Exhaust Manifold Gasket Set
        List Price: $28.99
        Starting At: $18.50

        Barr Exhaust Manifold Gasket Set by Sierra For GM 305/350 CID Engines and Barr Exhaust Systems. Use with Manifold 18-1997-1.

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      • Sierra 18-1902 Manifold Replaces 0912441
        List Price: $287.99
        Starting At: $168.29

        Sierra 18-1902 OMC Starboard Exhaust Manifold Sierra high-quality engine parts are designed to meet OEM specifications. Fits most GM Small Block (B8) 305-350 cu.in. (1979-1989) (Starboard). Use With: 18-2949 Exhaust Manifold Gasket 18-8502 Exhaust...

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      • Sierra 18-1907 Riser
        List Price: $185.99
        Starting At: $124.45

        Sierra 18-1907 Riser for Ford Small Block V-8 Sierra Cast Iron Riser for Ford Small Block V-8 302-351 cu. in. Use with: 18-1997-1: Manifold 18-1998-1: Manifold 18-4364: Exhaust Elbow Mounting Package (Open) 18-8535: Exhaust Elbow Mounting Kit...

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      • 27-99757
        List Price: $9.99
        Starting At: $8.36

        Exhaust Manifold Gasket, Mercury - Mercruiser 27-99757 Fits GM V-6 engines Replaces: GLM 32170 Mallory 9-61421 OMC 3853412 Sierra 18-2909 Volvo 3853412

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      • Sierra 18-8534 Exhaust Elbow Mounting Kit
        List Price: $14.99
        Starting At: $9.17

        Sierra 18-8534 Exhaust Elbow Mounting Kit Sierra replacement exhaust elbow mounting kit for use on OMC GM Small Block engines. OMC GM Small Block V8 305-350 cu. in. (1979-1989) & multi application for Ford & GM risers Use with: 18-1921...

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      • Sierra 18-0183-1 Exhaust Manifold Gasket
        List Price: $8.49
        Starting At: $5.53

        Sierra 18-0183-1 Exhaust Manifold Gasket for Mercruiser, OMC Sierra Exhaust Manifold Gasket for use on Mercruiser and OMC Stern Drives. Fits MCM/MIE Ford V-8 engines Use With: 18-1996 Manifold 18-1998-1 Manifold 18-1962-1...

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      • Sierra 18-4264 Pipe Plug
        List Price: $3.99
        Starting At: $2.67

        Sierra 18-4264 Pipe Plug Sierra high-quality engine parts are designed to meet OEM specifications. For use on Mercruiser Stern Drives and Mercury Marine engines. Using Pipe Sealant with Teflon is recommended for use on plug threads. Thread Size:...

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      • Sierra 18-4258 Pipe Plug
        List Price: $4.99
        Starting At: $3.06

        Sierra 18-4258 Mercruiser Pipe Plug Sierra stainless steel pipe plug with square drive. Note: Pipe sealant with Teflon is recommended for use on plug threads. Thread Size: 3/4" - 14 NPT Use With: 18-1949 Manifold Spacer 18-1984 Manifold...

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      • Sierra 18-4369 Exhaust Manifold Gasket Set
        List Price: $57.49
        Starting At: $33.45

        Sierra 18-4369 OMC Exhaust Manifold Gasket Set Sierra high-quality engine parts are designed to meet OEM specifications. For 2.5L (1985-86) and 3.0L (1985-88) engines. Interchangeable with: GLM 39770 Mallory 9-61450

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      • Sierra 18-8502 Exhaust Manifold Mounting Kit
        List Price: $59.99
        Starting At: $41.99

        Sierra 18-8502 Exhaust Manifold Mounting Kit for V-8 Small Block Sierra high-quality engine parts are designed to meet OEM specifications. OMC GM Small Block V8 305-350cu.in. (1979-89)  OMC/Volvo...

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      • Sierra 18-1898 Manifold
        List Price: $359.49
        Starting At: $251.99

        Manifold for 454 GM big block V8 Special Order est. 10 Days Port & Starboard For use with Chris-Craft inboard, Chrysler Inboard, Crusader Inboard, Universal Inboard Cooling Systems, Mercruiser I/O, & OMC Sterndrive/Cobra Engines. Fits 454 cu.in...

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      • Sierra 18-1909-1 Outlet Riser Replaces 3857944
        List Price: $274.49
        Starting At: $191.99

        7° 4" Outlet Riser - Special Order est. 10 Days OMC Riser, 4" outlet 7°:Fits many GM & Ford center rise manifolds. Replaces: OMC 913784, 3855270, 3850456, 3857944,3856444 Volvo Penta ...

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      • Sierra 18-2859 Manifold End Cap Gasket
        List Price: $2.99
        Starting At: $2.86

        Sierra 18-2859 Manifold End Cap Gasket for OMC Stern Drive Sierra high-quality engine parts are designed to meet OEM specifications. Interchangeable with: Barr OMC47311131 OMC Stern Drive 311131

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      • Sierra 18-2860 Manifold End Cap Gasket
        List Price: $3.49
        Starting At: $3.07

        Sierra 18-2860 Manifold End Cap Gasket for OMC Sierra high-quality engine parts are designed to meet OEM specifications. For use on OMC Stern Drives. Interchangeable with: Barr OMC47311130 GLM 33340 OMC Stern Drive 311130

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      • Sierra 18-4257 Pipe Plug
        List Price: $3.49
        Starting At: $1.59

        Sierra 18-4257 Pipe Plug Sierra high-quality replacement pipe plug for use.  Material: Black Steel Thread Size: 1/4" Note: Pipe sealant with Teflon is recommended for use on plug threads. Use with: 56507 Loctite Pipe Sealant (PST 6ml w/...

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      OMC Sterndrive Exhaust Manifolds are in stock now.