Good video by @318willrun

The 2020 Small Block Race penalty box says they're worth .8
That's my guess :D

12.5 it is.. as said by 318's own rules...
And again you two..... LOL... By the chart my car was supposed to run a 13.6, so with these heads it would have to run a 13.2. I can tell you, I'm faster than 13.2's, which I'm still on the winning side of my dial in by that chart. You see Jpar? Doesn't matter what component I throw at the car, I just keep a winning. :)