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Exhaust Manifold Conversion Kit 866178A02 - For Use on 496 Magnum and 8.1S MerCruiser Stern Drive and Inboard EnginesĀ 

  • Converts exhaust manifolds with water rails to the newer style, cast iron manifolds without water rails.
  • For select MerCruiser stern drive and inboard engines.
  • Coated for corrosion protection on internal coolant passages and exterior finish.
  • Gasket, drain plug, o-ring and drain elbow are included with the manifold.
  • Produced by Mercury Marine to our stringent original equipment manufacturer specifications to maximize the performance of your Mercury and Mariner outboard or MerCruiser stern drive

Exhaust conversion kit 866178A02 converts exhaust manifolds with water rails to the newer style, cast iron manifolds without water rails. For use on 496 Magnum and 8.1S MerCruiser stern drive and inboard engines.

Don't know if this part is right for your application? Use our handy Mercury Replacement Parts Finder Tool to check. Make sure you know your Model, Year and Serial Number.

NOTICE: Any images shown are representational ONLY and do not necessarily depict the actual part or included items in a particular part or kit. Mercury has been known to remove items depicted in product images such as screws or gaskets from kits they make without notification. For any product content, fitment or application questions on this part please call Mercury Product Support at 920-929-5040.

MSRP: $889.64
Your Price: $889.64
You Save: 0% off MSRP!

NOTE: This Item is a Non-Stocked, Special Order, OEM Mercury Part.
ALL OEM Mercury parts may take up to 7-10 days to ship. All OEM Mercury parts are NON-RETURNABLE! Orders placed on all OEM Mercury parts are NON-REFUNDABLE! Please contact us with the part number and we can assist you with more accurate delivery time estimate.
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Additonal Info On This Product:

Exhaust Manifold Mercruiser 866178A02

Exhaust conversion kit to convert exhaust manifolds with water rails to the newer style cast iron exhaust manifolds w/o water rails
Fits: MCM/MIE 496 Mag & 8.1S engines

Supercedes: 863120T2, 863120T03

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