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St220 intake on stock svt w/secondaries

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  • St220 intake on stock svt w/secondaries

    Just need to know what's required to fit the St220 ontop of a 2.5 cylinder head. Here is a list of other mods

    2001 cougar heads
    3l valves
    Lightened flywheel
    Gutted precats
    Gutted cat
    Optimized y-pipe
    65mm tb

    (Do i need bigger injectors)?

    Sent from my LG-V410 using Tapatalk

    Luck is where opportunity meets preparation.


  • #2
    You can't. Unless you have a custom machined lower intake manifold that splits from oval to split. (opposite of NPG style)
    '98 SVT E0 BLK/MNB#1663 Forged Ovalport 3L Supercharged

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    • #3
      and if it was a 3L cylinder head i would still need the same?
      Luck is where opportunity meets preparation.

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      • #4
        and if it was a 3L cylinder head i would still need this same part correct?
        Luck is where opportunity meets preparation.

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        • #5
          Only if it is a portmatched 3L head.
          '98 SVT E0 BLK/MNB#1663 Forged Ovalport 3L Supercharged

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          • #6
            Tried to do that awhile back but gave up.
            I have a 3L hybrid, Sable block with CSVT LIM. The ST220 UIM has a different bolt pattern, holes and Oval ports.
            From what i saw, options are:
            - Change the LIM or have a Full 3L which will solve the problem right away as they are oval port.
            - Ask NPG to machine a REVERSE adapter for you (slip to oval into oval to split). It cost $400 and you need to figure out gasket. Also, it will rise the UIM even more.

            From your list of mod, I would rather spend the $400 for a set of MSDS header or a Dyno Tune for more power.

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