06-22-2020, 07:57 AM
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Senior Club Cobra Member
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Join Date: Mar 2000
Location: St. Augustine,
FL
Cobra Make, Engine: E-M / Power Performance / 521 stroker / Holley HP EFI
Posts: 1,947
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Not Ranked
Adam,
Experience(!) has shown header bolts to be problematic - as in: they vibrate loose and back off, even falling out on occasion.
Similarly, lockwashers can be hit and miss. Sometimes they too fall out.
I ended up putting these on more than 30K miles ago - no regrets, no loosening: https://www.jegs.com/p/Stage-8/Stage...49275/10002/-1
I had to modify a few of them to clear the header primary tubes by grinding a relief in them. Otherwise not too hard to install.
Hope this helps,
Tom
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Wells's law of engine size: If it matters what gear you're in, the engine's too small!
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