2015 Rules

[SSDiv6]

Originally Posted by Rich67stang

After reading your post, maybe I was being a little narrow minded, I just assumed the aftermarket casting would have to be based off of OEM parts. The LS cast iron was not legal before this rule change? As for N351 not competing...Mr. Perno Must have made the Chevy guys nervous...lol.

The new rule change is for any aftermarket inline cast iron cylinder, not OEM based. I learned about the proposed rule change from a cylinder head porter that was doing a set of LS type GM heads, although they were only available in trucks and not cars. I spoke directly to NHRA last year and they confirmed they had approved the LS cast iron head and were considering allowing any aftermarket cast iron head, which just happened.

This does not have anything to do with Vince Perno; this was proposed last year.

If you have never seen the ProAction Chevy based cylinder head, you will have a rude awakening. With the ProAction 14 degree head, there is not a Ford or Mopar that will be able to win a heads up. The head is available up to a 300cc runner volume and they will flow 400+ CFM's.

The heads hold records in the Nostalgia classes.

Just take a look at the head: