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12-31-2008, 08:58 PM
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Member
Join Date: Feb 2008
Location: Black Creek, BC Canada
Posts: 331
Likes: 79
Liked 172 Times in 81 Posts
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Valve seat angles in stock
Just got my 2009 NHRA rule book, the cylinder head section in stock says stock angles plus or minus 1 degree. I had heard the "any valve grind permitted" was coming but the stock angle thing was a surprise. This should be interesting with some of the "approved" aftermarket heads where the angles don't match OEM.
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