Thread: Approval of Super Stock Class Aftermarket Cylinder Heads
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Old 04-27-2023, 11:37 AM   #4
SBillinson
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Smile Re: Approval of Super Stock Class Aftermarket Cylinder Heads
Quote:
Originally Posted by Don Kennedy View Post
What am I missing? The NHRA-APPROVED casting number by NHRA
That's it? You trying to protect that Pontiac head?
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