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10-26-2010, 04:57 PM
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#7 |
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VIP Member
Join Date: Nov 2001
Location: Florida
Posts: 1,542
Likes: 34
Liked 138 Times in 51 Posts
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Re: 2011 Stock/Super Stock Rule Changes
Do I understand correctly that now "any" valve spring is permitted, including dual springs "provided no modification to head is performed."? But that removing the "step" on Mopar heads would be considered a "modification"?
IHRA usually follows NHRA. |
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