That mani should et better just from the weight reduction alone

The heads for this intake.
This is my largest W9 intake port program.
The head and intake was to go on 440CISBM at this point dont know what they are going to go on customer had change in plans I hope they make it onto something
At the intake flange it is 1.405" by 2.250 and should support 900HP with this intake.

exhaust port

Intake is so close I can taste it.....

Done....

done #2

done 3

helluva job there

Amazing, thanks for documenting the transformation.

hey Man, Looks like ya missed a spot...... .... Are you gona flow this set up?

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Very nice work! I would like to see EGT's after for distribution purposes...the center runner dividers are cast 'wrong' but leave material to correct this issue. Most people leave distribution disparity alone but, it's worth a fix. The 'undercut' at the divider bottom helps but you'll never know without EGT's. Again very nice work just trying to help.

Thanks Sean  I would love to see the egt's for this.
This is only 3rd "598" I have done a whole port job on start to finish most are just updated from 4150 to 4500 plus open up ports.
Do you have any pictures you would share of divider area?
Have you done any back to back 420 vs 598?

This should be darn good 598 intake it surprised me that I could get 4.5" cross section in the plenum with out to much weld on out side of intake.( only one small hole)

Brett, we need to go in on a cnc machine. I'm in the middle of doing 3 Indy 4500 conversions and just plain sick of porting. That's all I do anymore it seems.
By the way, nice work. Intake manifolds SUCK to port!!
Hope your boy is doing good. Our second boy will be here first of Oct.

wow