Rpm ranges on these MP intake manifolds

Does anybody know what the listed RPM range is on the following MP part numbers?
As I’m not having any luck finding a P4529117 anywhere in the USA

P4532060
P4532061


Thanks Moparts!

P4529117 is a newer number for P4532060. Same manifold, different part number.
I found a pic of the P4532061 and it looks identical to the other 2.
These are nothing more than aluminum versions of the factory cast iron HP manifolds.

I used to have the RB version on a 440 years ago. It's exactly the same as the cast iron piece...weight savings is the only advantage.

My guess would be 1,500-5,500.

stock type intake: 1000rpm-4500rpm. these may rpm a little higher but i'll bet power is dead at 5000rpm.

This is what I have found out about this intake on-P4529117, the rpm range is from idle to 5800 and fits stage IV,V and production heads.

What is your source for this?

If it is an intake that is fashioned after the factory intake for a 440, I agree with Lew. Power will drop like a stone at 5200. The intake is the cork on a factory 440.

If you insist on that intake and want to up the power and rpm range, mill the divider, add an open space as room allows, and cam up slightly from stock.

a few years back somebody on this website flow tested a stock intake and IIRC they got 200cfm. think about it. a stock head, which is inadequate for performance, will flow a little better than 200cfm. I don't think intake manifolds by themselves dictate peak rpm, but they will dictate a power range. I think valve train stability is more of the key to peak rpm. take what the marketeer's say with a grain of salt.