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Old 03-03-2015, 07:10 AM   #8
Pedigo Perf
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Default Re: New Aluminum Cylinder Heads for the 396

Quote:
Originally Posted by SantinoBlanco View Post
The 60547 heads on summitracing.com says the spark plug hole is moved closer to the combustion chamber by .150 and the NHRA rule book says it has to be in the same location. Not sure how it's an accepted product
By adding 10 HP
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