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valve spring tolerance

  1. Stock valve spring tolerances

    ZETEC Performance (2000-2004)
    i was wondering if anyone new how much lift you could put on the stock valve springs and still be safe. I want to get some camshafts and cant afford to get the aftermarket valve springs right now(im not very patient when it comes to upgrading my car lol). I guess its prob. better if i just...
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