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MerCruiser 4.3 Manifolds

MerCruiser 4.3 Manifolds

MerCruiser 4.3 Manifolds
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  • OEM MerCruiser 4.3 V6  Ceramic Coated Exhaust Manifold 99745 99746A17

    OEM MerCruiser 4.3 V6 Ceramic Coated Exhaust Manifold 99745 99746A17

    Mercury Marine / Quicksilver

    $396.92 $309.78
    OEM MerCruiser 4.3 V6  Ceramic Coated Exhaust Manifold 99745 99746A17  Exhaust manifold 99746A17 is for use on the port or starboard (left or right) side of V-6 (220 and 262 cid) MerCruiser stern drive and inboard engines (model year 1985...
    $396.92 $309.78
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    $396.92 $309.78
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  • OEM MerCruiser 4.3 Dry Joint Exhaust Manifold (2002+) 864612c 864612T01

    OEM MerCruiser 4.3 Dry Joint Exhaust Manifold (2002+) 864612c 864612T01

    Mercury Marine / Quicksilver

    $472.07
    OEM MerCruiser 4.3 Dry Joint Exhaust Manifold (2002+) 864612T01 Exhaust manifold 834612T01 is for V-6 MerCruiser stern drive and inboard engines made by General Motors with dry joint exhaust systems (serial number 0M615000 and up, model year 2002 and...
    $472.07
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  • Sierra MerCruiser 4.3 Liter V6 Exhaust Manifold 99746A17 9975 18-19521

    Sierra MerCruiser 4.3 Liter V6 Exhaust Manifold 99746A17 9975 18-19521

    Sierra

    $398.29 $284.23
    Sierra 18-1952-1 Replacement Exhaust Manifold Kit For MerCruiser V6 4.3 Liter 02 and older engines Will not work for dry joint systems Kit Contains: • 1x Exhaust Manifold • 1x Mounting Package • 1x...
    $398.29 $284.23
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NuWave Marine has top-quality replacement MerCruiser 4.3 manifolds to redo your exhaust system. Marine exhausts are complex systems that need routine maintenance. An imperfect seal or a crack could lead to water flowing into your motor, which could have catastrophic results. We recommend inspecting your MerCruiser exhaust every year, and replacing it every five years for saltwater use. If you have a freshwater boat, you’ll find that parts likely last longer, but it’s still important to do an annual inspection.

4.3 MerCruiser Intake Manifold

The intake manifold is one of the most important parts of the MerCruiser 4.3 exhaust. The 4.3 MerCruiser manifold collects spent gasses from three pistons and passes it along to the riser. Six-cylinder 4.3 engines have two manifolds, one to collect exhaust from each side. Since manifolds have to put up with a lot of heat and vibrations while the engine is running, it’s possible even well-made designs will suffer wear and tear related to this stress. Make sure you check for cracks as fissures. The area around the gasket seals can also suffer damage from use. Make sure it gets extra attention during your yearly inspection. If it seems like your gaskets are aging faster than they should, it might have to do with a damaged manifold or riser.

4.3 MerCruiser Exhaust Manifold Conversion Kit

Older 4.3 V6 MerCruiser engines used a “one piece” manifold design. If you’re replacing the exhaust system on one of these engines (made in the 90s or earlier), you’ll need a conversion kit. NuWave Marine carries 4.3 MerCruiser intake manifold conversion kits, as well as MerCruiser 4.3 exhaust Y-pipes that are used to combine the output of a dual manifold exhaust.

MerCruiser 4.3 Manifolds and More Replacement Parts

From MerCruiser 4.3 riser elbows to small parts like gaskets and bolts, NuWave Marine only carries premium OEM parts and aftermarket parts from top manufacturers like Sierra. If you’re looking for manifold conversion kits or MerCruiser 4.3 spacer kits, we’ve got those, too. If you have any questions about which parts are right for your engine, don’t hesitate to contact our team today.