Mercruiser marine exhaust manifolds

We carry all gaskets in stock. 3-year warranty on all Osco & Barr manifolds & risers. Click the Mercruiser manifold images to enlarge.
Click to enlarge Part # Specs Price
Exhaust manifold. Fits 229 and 262 cu. in. (4.3) engines. V-6. Exact replacement for Mercruiser #'s 99745 and 99746. Fits both sides of engine. Three yr. warranty. This product is also available as an import product at substantial savings. 9745 Exhaust manifold. Fits 229 and 262 cu. in. (4.3) engines. V-6. Exact replacement for Mercruiser #'s 99745 and 99746. Fits both sides of engine. Three yr. warranty. This product is also available as an import product at substantial savings. $209.00
Exhaust riser. 4" exhaust outlet. For late model inboard/outboard and inboards. Exact replacement for Mercruiser #44354, 807914 and 807988. This riser is also available in aluminum. Please call for pricing. Also available at substantial savings in import product. 4354 Exhaust riser. 4" exhaust outlet. For late model inboard/outboard and inboards. Exact replacement for Mercruiser #44354, 807914 and 807988. This riser is also available in aluminum. Please call for pricing. Also available at substantial savings in import product. $139.00
Exhaust riser. 3" exhaust outlet. For early model inboard/outboard models. Exact replacement for Mercruiser #s 98503 & 98504. 8503-A Exhaust riser. 3" exhaust outlet. For early model inboard/outboard models. Exact replacement for Mercruiser #s 98503 & 98504. $135.00
Exhaust riser. 3" exhaust outlet. 0 degree riser for some early model straight inboards. Exact replacement for Mercruiser #98502 8502 Exhaust riser. 3" exhaust outlet. 0 degree riser for some early model straight inboards. Exact replacement for Mercruiser #98502 $179.00
Gasket, restrictor. Fits center riser Mercruiser. Common use is on all raw water cooled engines. Replaces Mercruiser #27-41813. 8503-GR Gasket, restrictor. Fits center riser Mercruiser. Common use is on all raw water cooled engines. Replaces Mercruiser #27-41813. $6.00
Gasket, manifold to cylinder head. Replaces Mercruiser #27-99757. CS-GH Gasket, manifold to cylinder head. Replaces Mercruiser #27-99757. $7.50
Small Block V-8. Exhaust manifold. Fits 305-350 cu.in. (5.0-5.7) GM small block engines. Fits both sides of engine. Replaces Mercruiser #s 87114 and 860246. Up dated to replace all small block Mercruiser center riser manifolds. Exact replacement for Mercruiser. Three year warranty. This manifold is also available in aluminum. Also available in import product at substantial savings. 7114B2 Small Block V-8. Exhaust manifold. Fits 305-350 cu.in. (5.0-5.7) GM small block engines. Fits both sides of engine. Replaces Mercruiser #s 87114 and 860246. Up dated to replace all small block Mercruiser center riser manifolds. Exact replacement for Mercruiser. Three year warranty. This manifold is also available in aluminum. Also available in import product at substantial savings. $189.00
V-8 GM Block. Exhaust manifold. Fits 454/502 cu.in. GM Big Block engines. Fits both sides of engine. Exact replacement for Mercruiser #89011. Three year warranty. This manifold is also available in aluminum. 9011A V-8 GM Block. Exhaust manifold. Fits 454/502 cu.in. GM Big Block engines. Fits both sides of engine. Exact replacement for Mercruiser #89011. Three year warranty. This manifold is also available in aluminum. $229.00
Exhaust riser. 4" exhaust outlet. For late model inboard/outboard and inboards. Exact replacement for Mercruiser #44354, 807914 and 807988. This riser is also available in aluminum. Also available in import product at substantial savings. 4354 Exhaust riser. 4" exhaust outlet. For late model inboard/outboard and inboards. Exact replacement for Mercruiser #44354, 807914 and 807988. This riser is also available in aluminum. Also available in import product at substantial savings. $139.00
Exhaust riser, 3" exhaust outlet. For early model inboard/outboard models. Exact replacement for Mercruiser #s 98503 & 98504. 8503-A Exhaust riser, 3" exhaust outlet. For early model inboard/outboard models. Exact replacement for Mercruiser #s 98503 & 98504. $135.00
Exhaust riser, 3" exhaust outlet. 0 degree riser for some early model straight inboards. Exact replacement for Mercruiser #98502. 8502 Exhaust riser, 3" exhaust outlet. 0 degree riser for some early model straight inboards. Exact replacement for Mercruiser #98502. $179.00
Gasket, restrictor, Fits center riser Mercruiser. Common use is on all raw water cooled engines. Replaces Mercruiser #27 41813. 8503-GR Gasket, restrictor, Fits center riser Mercruiser. Common use is on all raw water cooled engines. Replaces Mercruiser #27 41813. $6.00
Gasket manifold to cylinder head. Replaces Mercruiser #27-46820. CW-GH Gasket manifold to cylinder head. Replaces Mercruiser #27-46820. $7.50
Gasket manifold to cylinder head. Replaces Mercruiser #27-33395. CV-GH Gasket manifold to cylinder head. Replaces Mercruiser #27-33395. $7.50