How much more power will AFR 190s give over stock Vette heads or fast burn heads? I know AFRs site says 80hp over Vette heads...Is this a pretty close estimate? What about fast burn heads? Because if it comes down to 10-15 hp between the Scogins manifold & Fast Burns & the AFRs then I'll save the $300+ & go with that setup.

Thanks a bunch,
-Timbo-

 

You also need the cam and intake to match the heads to get the full effect. Putting AFRs on a bone stock L98 is probably not going to get you 80 HP.

However, if you had a 383 with a Miniram and a cam like 224/236 with .500+ duration, then yes it probably yield 80 HP more over Vette heads (assuming similar compression ratios).