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Had the new heads flowed

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  • Had the new heads flowed

    Looks like the new pro topline 220 heads are pretty good right out of the box

    numbers>
    all are tested @28"
    .200 131 I 91E
    .300 186 I 125 E
    .400 235 I 148 E
    .500 267 I 163 E
    .600 288 I 174 E

    I stopped at .600 because that what the cam is .625 to be exact.
    My buddy said that just putting in a 2.05 valve in these with a bowl clean up will bring them to over 300 cfm intake. The exhaust was done without a pipe and would be higher.

    All in all very happy, Now on with the 406 to see how these work.

  • #2
    :giggity:

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    • #3
      Just got the Bowtie heads done too. Looks like it will be a good Aug. Who's up for an ass kickin'

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      • #4
        Thanks for the valve job, My heads made better numbers on the bench.

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