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jmantle · 12-31-2008, 08:58 PM

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.

12-31-2008, 08:58 PM	#1
jmantle Member Join Date: Feb 2008 Location: Black Creek, BC Canada Posts: 331 Likes: 80 Liked 172 Times in 81 Posts	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.