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  1. 07-09-2009, 12:16 PM #1
    supercharged666
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    90mm F.A.S.T Throttle Body

    Anyone know if a 90mm FAST TB will bolt up to a stock LS1 intake on a 98 T/A. Also what is the stock opening on the LS1 is it 78mm? Is an LS6 intake 85mm?
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  2. 07-09-2009, 01:04 PM #2
    Hi-Po
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    No. FAST is a 4 bolt TB opening.
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  3. 07-09-2009, 02:19 PM #3
    supercharged666
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    What about an LS6 intake? Will it bolt up to that or is that the same as a Ls1
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  4. 07-09-2009, 03:03 PM #4
    Hi-Po
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    Same. And if Im not mistaken... the 78mm and 85mm numbers your confusing is the difference between The LS1 Mass Air Flow and the Truck MAF.
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  5. 07-10-2009, 12:33 AM #5
    mark21742
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    the ls1 and ls6 tb mount is pretty mych identical with a 3 bolt mount.
    the 90, and 92mm tb uses a 4 bolt pattern
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  6. 07-10-2009, 07:30 AM #6
    Dr.Crash
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    Quote Originally Posted by mark21742 View Post
    the ls1 and ls6 tb mount is pretty mych identical with a 3 bolt mount.
    the 90, and 92mm tb uses a 4 bolt pattern
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