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Which header makes more power

This is a discussion on Which header makes more power within the External Engine forums, part of the LSx Technical Help Section category; KOOKS 1 3/4 KOOKS 1 3/4-1 7/8 step or KOOKS 1 7/8. For my 02 ws6...

  1. #1
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    Which header makes more power

    KOOKS 1 3/4 KOOKS 1 3/4-1 7/8 step or KOOKS 1 7/8. For my 02 ws6

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    For a stock cubed motor...get the stepped ones.

    The 1 3/4" primaries are more than enough on the 346 LS1.
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

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    Headers

    Cool thanks for the info

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    Question Headers

    QTP's or KOOKS

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    Slow'er'Ass Mr. Luos's Avatar
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    Either are fine.
    Numbers would be damn near the same.

  6. #6
    Senior Member INMY01TA's Avatar
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    I would think the 1 and 3/4 would have less clearance issues over the stepped ones. What you think Luos?

  7. #7
    Slow'er'Ass Mr. Luos's Avatar
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    I run a full 1 7/8" primary on my Kooks...no clearance problems at all.

    But I am sure they would tuck up even tighter being a touch smaller.

  8. #8
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    You guys been great help thanks

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