1998 7.4 (454) Mag MPI Mercruiser Exhaust and Riser Replacement SD 480p
1998 7.4 L Mercruiser Exhaust and Risers with 3" spacer Replacement Loctite 510 Sealant https://www.amazon.com/Loctite-442-51... Permatex Aviation Form-a-Gasket https://www.amazon.com/Permatex-80019...

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How to Replace MERCRUISER Exhaust Manifolds & Risers, Part One- Port Side

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Mercruiser 7.4 MPI Rebuild and Upgrade - Part 1

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