2015 Rules

[SSDiv6]

Originally Posted by Rich67stang

2008 and newer CobraJets/Dragpacks/Copo are in their own classes now, so have at it! Good move by NHRA. SS/CS index should get lowered next year with the acceptance of "aftermarket heads", another good move by NHRA.

Yep, it is a great move for making the GM products go faster since it will make legal the use of the Chevy LS cast iron and aftermarket 11, 15 and 18 degree cylinder heads!

The Ford N351 cylinder head cannot compete against the GM offerings.