Totally agree. These particular Magnums pale in comparison to the EQ's which move and honest 237-238 cfm ootb with nothing but a valve job touch up. Oh and they don't stall they just plateau. J.Rob
The one stock Magnum I tested years ago is just a few numbers better on the intake (202 peak) and about 10 better on the exhaust. I'm guessing the seat inserts are somewhat to blame for the less than average Magnum flow numbers. None the less some quality time with the carbide will whip them into shape. Who's castings are these and what do they cost? If you don't mind my asking.
