Mopar manifold question
 

I have a M-1 Mopar, part#P4452893. Can anyone tell me the RPM operating range of this manifold? I've ask the question else where and have received MANY different answers....anyone know for sure what it is.
I have it on a 360 small block. Thanks

Stock 2500-6000, With work higher, But i swapped mine for a indy :!: :!:



''JUST MY TWO CENT'S WORTH''

Thanks for the reply....