Aluminum intake on a 1979 SDV 425CID
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, Aluminum intake on a 1979 SDV 425CID in Past Cadillac Vehicle Discussion; Hello, just wondeing if anyone has installed an aluminum intake (Edelbrock Performer) on a 425. It is listed as available ...
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    cookieeater is offline Cadillac Owners Member
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    Aluminum intake on a 1979 SDV 425CID

    Hello,
    just wondeing if anyone has installed an aluminum intake (Edelbrock Performer) on a 425. It is listed as available for the 472 and 500 and not the 425. I know the 425 is very very similar. I m thinking it will work. Thanks in advance, Kim

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    deVille33 is offline Cadillac Owners Connoisseur
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    Re: Aluminum intake on a 1979 SDV 425CID

    You will have to check the deck height of the 425 against that of the other 2 engines. I am sure the deck height of the 425 and the 368 is the same as the 472. The difference in the two is that the 425 was a single plane manifold to accommodate the emissions system used in 1977 - 79. The 472 was a dual plane type manifold and will interchange with the '77 - '79 manifold.

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    The Ape Man is offline Cadillac Owners Connoisseur
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    Re: Aluminum intake on a 1979 SDV 425CID

    It should fit. I've used 500 C.I. intakes on 425s and 425 on 500s.

    It will not work well with a 368 due to port sizes.

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    afaia1978 is offline Cadillac Owners Member
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    Re: Aluminum intake on a 1979 SDV 425CID

    I have seen other people use them on the 425's and they fit just fine. The only problem I can think of is that the Edelbrock is a Non-Egr manifold which might lead to a problem if you plan on reinstalling all the smog equipment.

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