339 I/O Mercruiser • MOTOR & DRIVE UNIT Part No. Description OE No. 18-1908K Manifold Spacer Kit 807476A6, 93320A5 18-1908 Manifold Spacer 93322A12 Application 3" Riser Kit for Manifold: 18-1957-2. Includes (2) spacers, restrictor, open, & blocked gasket. All necessary mounting hardware is also included 3" Spacer for Manifold: 18-1952-1. Use with mounting kit 18-8556 (Note: To mount elbows to spacer a separate mounting kit is needed) Manifold Riser Spacer Kit Manifold Port & Starboard Manifold Manifold Port & Starboard V6 Dry Joint Exhaust Manifold Elbow Elbow Riser Exhaust Elbow (Dry Joint) Exhaust Manifold (Dry Joint) Manifold Port & Starboard Supplied with Mounting Package Use with: Mounting Kit: 18-8533 Supplied with Mounting Package Supplied with gaskets Use with: Mounting Kit: 18-8520 Will t either side Use with: Manifold: 18-1952-1, 18-1953-2, 18-1957-2 Riser Gasket: 18-0897 restrictor, 18-2849-1 open, 18-0672 blocked Mounting Kit: 18-8505 Use with: Manifold: 18-1955-1, 18-1954-1, 18-1956-3, 18-1901 Riser Gasket: 18-2833 Mounting Kit: 18-8551 Bellow: 18-2748 Use with: Manifolds: 18-1843, 18-1842 Dry Joint Elbow Gaskets: 18-0720, 18-0721 or 18-0722 Use with: Manifold Gasket: 18-2949 Elbow Gaskets: 18-0720, 18-0721 or 18-0722 Elbow: 18-1845 Use with: Manifold: 18-1952-1, 18-1953-2, 18-1957-2 Elbow Gasket: 18-0897 restrictor, 18-2849-1 open, 18-0672 blocked Mounting Kit: 18-8529 Use with: Dry Joint Elbow Gaskets: 18-0720, 18-0721 or 18-0722 Use with: Exhaust Manifold Gasket: 18-0418 Mounting Kit: 18-8532 Part No. Fits Replaces 18-1952-1* Most 4.3L (262 CID) V-6 application Mercruiser 99746A8, A17 Part No. Fits Replaces 18-1966-1 3.0L/LX (1990 & Newer); Marine Power Engine Model E181S 806867A2, 806867A3, 806867A8, 806867A9, 806867A12, 816329A3, 860235A03, 99798A18 Part No. Fits Replaces 18-1957-2* Most Mercruiser (GM) V-8 big blocks with center riser Mercruiser 807078T08, 807078Q07 Part No. Fits Replaces 18-1842 4.3L Alpha/Bravo (2002 and Newer without Engine Catalyst) 864612T01 Part No. Fits Replaces 18-1970-2* V-6 & V-8 applications, 15° (3” O.D. Riser) Comes with 18-0897 & brass plugs Mercruiser 98504A3, 98503A2, 95755A2 Marine Power 0992-115, Barr MC-20-98504 Part No. Fits 18-1976-2* Most Mercruiser V-6 & V-8 applications 7° (4” O.D. Riser) Comes with 18-0897, 18-4263 & 18-4258 Replaces Mercruiser 44354A3, 44354A9, 44354A10, 44354A13, 807914A1, 807988A2, 807988A03 Marine Power 0992-400, Barr MC-20-44354 Part No. Fits Replaces 18-1975-1* late Model Mercruiser 4 cyl. Engines Mercruier 12076A1, 12076A2, 95864A2 Marine Power 6000-33A Part No. Fits Replaces 18-1845 2004 & Up V6 & V8(305, 350, 377) SN 0W310000 & Up, 2002 & Up V8(350 & 377) SN 0M317000 & Up 864591T02 Part No. Fits Replaces 18-1843 305, 350, 377, 5.0L, 5.7L, 6.2L(2002 and Newer) 865735A02, 865049T01, 864308T01 Part No. Replaces 18-1953-2 Mercruiser 860246Q11 Will t either side - Fits most Mercruiser(GM) small blocks with center riser. Shop 24/7 at www.seawide.com (S5M)
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