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Parts Selection Guide

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      OMC Exhaust Manifolds

      • Sierra 18-4369 Exhaust Manifold Gasket Set
        $24.99
        $17.49

        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 18-1902 Manifold Replaces 0912441
        $439.99
        $307.99

        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 18-1992-1 Manifold Elbow Adapter
        $325.99
        $227.99

        Sierra 18-1992-1 Manifold Elbow Adapter Sierra high-quality engine parts are designed to meet OEM specifications. For 3" I.D. Exhaust Hose. 80° Interchangeable with: Barr 200087P Mallory 9-40120

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      • Sierra 18-0183-1 Exhaust Manifold Gasket
        $16.99
        $12.99

        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 18-4394 Exhaust Manifold Gasket Set
        $30.99
        $21.49

        Exhaust Manifold Gasket Set - by Sierra Special Order est. 10 Days For: GM 350 (5.7L) CID Eng; 250 HP S/N 4768000-4908849 255 HP S/N 5195909 & UP Contains: 4 18-2832 Manifold End Cap Gasket (OEM 27-48043) 4...

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      • Sierra 18-4264 Pipe Plug
        $4.99
        $3.99

        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 18-8502 Exhaust Manifold Mounting Kit
        $71.49
        $49.99

        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 18-8534 Exhaust Elbow Mounting Kit
        $17.99
        $12.49

        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 18-1898 Manifold
        $431.99
        $302.49

        Sierra 18-1898 Exhaust Manifold for 454 GM big block V8 For use with Chris-Craft inboard, Chrysler Inboard, Crusader Inboard, Universal Inboard Cooling Systems, Mercruiser I/O, Volvo Penta, & OMC Sterndrive/Cobra Engines. Material: Cast...

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      • Sierra 18-1921 Manifold Elbow Replaces 0909863
        $283.99
        $198.99

        Sierra 18-1921 V-8 Small Block Exhaust Elbow Sierra replacement exhaust elbow fits most GM V8 Small Blocks. Use with: 18-1902 Manifold 18-1903 Manifold 18-8534 Exhaust Elbow Mounting Kit 18-8553 Hardware Kit [Exhaust Elbow Bolts] 18-0943-1-9...

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      • Sierra 18-2859 Manifold End Cap Gasket
        $5.49
        $3.99

        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 18-4258 Pipe Plug
        $5.99
        $4.49

        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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      OMC Sterndrive Exhaust Manifolds are in stock now.