Pplz

Greetings, i was wondering if anyone used this heads for Ls9 applications ? Max effort ls9 or 2650? in papers i think its the best on the market so far .. so i would like to get more informations about it

Ravenrider1k

Mast black label heads are the way to go. Frankenstein is still Chinese castings pretty sure

703z06

Any source for this?????

Rokket

Greg at Kong Performance is using them on his ZR1. He has an LSR 427, ported 2650, meth injection,solid roller cam, etc except no n2o. It is truly the definition of max effort. He has run mid 8s at 175ish.


When I bought a ZR1 in 2018, Frankenstein had just announced the new heads. I called them for an ETA and they didn't have one. I then got a set of AFRs from Tony Mamo. Be advised, ported LS9s are making the same hp as aftermarket ported heads. I do think once you start upping cubic inches and making other changes, the aftermarket heads should shine more. However, most people with ZR1s are still on SBE and the ported LS9s are making the same power as those with aftermarket heads.

I believe all aftermarket heads are taller than stock LS9s. If you are using ZR1 accessories, you'll have to space the alternator up and clearance either the alternator bracket or the valve cover. On the driver's side, you have to clearance the valve cover to clear the PS bracket/pump. I am using Mamo AFRs on my ZR1 and had to do all that.

I would love to see an HP shootout between the F310s, M311s, and other aftermarket heads with all things else being equal.

Pplz

Tbf, i've seen soo many cars with F710, M311 struggling with the stock ls7 style rockers because of the weak casting, but it FLOWS.. their data sheet for the ported ls9 heads is a pretty impressive, mines ported by ahp 7 years go and the flow numbers what they gave me is so close to it.. i'm a little bit confused if its worth it to swtich to the F310 or M311 or just stick with the Ahp port

American Heritage

Great to hear your super happy even 7 years later!!!
Thank you for the feedback!
Our LS9 CNC program along with our LS7 CNC program is the bees knees
LS9:
https://americanheritageperformance....cylinder-heads
LS7:
https://americanheritageperformance....cylinder-heads


https://americanheritageperformance.com/

Pplz

You guys did a very very good job with it, i think i had an old profile port than the new one, cause the data sheet u guys provided me with is just a little bit higher than the sheet on the website, which it makes me happy with, and it was before u guy use ur logo on the head.. but i'm good with this xD .. i mean i'm happy with 373@700lift since 2015

American Heritage

Thank you again for the very good feedback!!!
We do alot of LS9 heads and have a killer LS9 CNC head program now just for anyone who is reading this.
Here is a link:
https://americanheritageperformance....cylinder-heads
Thanks again for your business