OK I'm thinking about buying either of these 2 sets of heads.....Which is better and how much HP should I see from each? Please help ASAP as I'm trying to do this soon. They dont with 2.00 and 1.56 or whatever the bigger valves are. Thanks!

ex in
lift lift
100 41.34 100 71.59
200 106.31 200 133.36
300 145.61 300 184.05
400 174.51 400 226.48
500 184.94 500 261.52
550 193.93 550 259.33
600 193.94 600 254.90

#3

ex in
lift lift
100 41.34 100 73.90
200 99.54 200 137.15
300 140.84 300 193.94
400 167.51 400 226.48
500 184.05 500 248.10
550 190.98 550 254.90
600 193.94 600 257.13

 

I would go with the first set...they have better peak flow and out flow the other set all the way up...Looks about what my GTP stage II's flowed..

 

How much HP could I see with them?

 

what cam are you going with??? cause thats what matters when picking out the heads...

 

I got the Hot Cam Kit.......

 

The second set should run stronger than the first. That jump on the intake from 400 to 500 is pretty strange. They also show evidence of turbulence in the port because they fall back after 500 lift. That second set will make more power. Look at the low lift #s and how they consistantly climb.

 

Well, my cam is only good up to a .500 lift I believe.....if that helps........