Speedmaster heads are on and running.....

MOPAROFFICIAL said
Everything has its place.



You basically 'at your valve lifts' gained 6-8 cfm. That's a days work most would rather watch for free. Lol

The real test....put the other heads back on, change the cam and the rest, gear, convertor...run it...then swap heads.

It has to be apples to apples... not apples to caramel dipped apples.

What do they add, same cam and everything when used in their 'sweet spot'
Click to expand...
As many of these SM heads that were sold to FABO members, I think you'll have two handfuls of examples of what the difference is with hot cams and such. I'm sure I'll be the only one that went on the opposite side of the spectrum and asked "what would be the difference on the stock end of things"? Glad I did, because now we know