I really like the M1 some people may say it works better in the upper RPM Range. I would disagree in my uses with it. It worked well for me on my Stroker engine from 2500-6800+RPM using a Solid Flat Tappet Camshaft. Head & Cam choice always play into what Intake to use. For an all around street car it is my first choice for a single plane intake.
