Best Exhaust manifolds for 502 Mag MPI?
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Best Exhaust manifolds for 502 Mag MPI?

  1. #1
    Junior Member Lavey24's Avatar
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    Default Best Exhaust manifolds for 502 Mag MPI?

    I'm thinking of replacing my stock Merc exhaust manifolds, any recommendations? My engine is stock, other than a K&N air filter.
    2000 Lavey Craft 24 Nuera Cuddy 502 Mag MPI

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  3. #2
    FNG 280xp's Avatar
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    Default Is it worth it to you?

    If you can afford headers and you feel your boat is worth it go that route. As for replacing the stock manifolds.... On my previous boat I didn't feel it was worth the expense of headers so I bought some replacement manifolds off of eBay. I think they were imco and just the manifolds were around $500.

    On the boat I have now it's a no brainier...... CMI Headers!

  4. #3
    Senior Member Smallblocksperry's Avatar
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    Quote Originally Posted by Lavey24 View Post
    I'm thinking of replacing my stock Merc exhaust manifolds, any recommendations? My engine is stock, other than a K&N air filter.
    imco powerflows will work great, i run them on a 1000HP mill.

    building my own double wall jacketed headers, if you're interested in a used set of imcos let me know 626-991-2129

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  6. #4
    Junior Member Lavey24's Avatar
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    Default

    Thank you, I'm leaning towards the CMI headers.

  7. #5
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    Default

    My uncle runs IMCO powerflow's and swears by them.

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