What does Basic Operating RPM Range on an intake mean?
The professorial products has an operating range of 1500-6500
So which one is better?
You would really not tell a difference in high or low end with those manifolds. They are both street manifolds, are you referring to the FAST or the LS6? The FAST is pretty much the best all around manifold. I like mine alot, im only taking it off of my race motor to install a Vic Jr, then the FAST is going on my Z06.



