Thread: Legal Heads for SS/modified
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Old 02-22-2019, 01:01 PM   #33
FireSale
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Default Re: Legal Heads for SS/modified
Quote:
Originally Posted by Adger Smith View Post
If it has a GM casting number is it legal, Not talking about the SS/CS class.. the rest of the modified classes.
But would it have to be approved for SS/CS?

It's aluminum, so no for SS/CS. Inline iron heads only.
Handy link:http://www.castingnumbers.info/site/main
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