I was just wondering on average
what gains (hp, tq and et) pple see with
Ported Stage 1 heads and
Ported Stage 2 heads
No specific machinist, 5.3 or 5.7 L.

I know with cam and headers ect...
there excellence would be proven.

I just wanted stand alone averages
with out the cam.

thanks for any info!

 

seems like most people get 15-25rwhp from just heads.. it various a little depending.. but you dont see the big gains till you go cam and stuff..