Is it true? $405

It's about $160-170 and 3 months wait. So good luck. You can get the fx power plenum for $175 and way faster imo. Both should have the same power but people claim Michal is more power. Maybe fanboys? Who knows. Unless one actually have both and and tested side by side.

Why should they have the same power? One is 53 one is 70cc volume. The one with 53 is usually combined with a new weaker hammer spring and different setup on the valve return spring that people have been cutting to add power.

Combined with some easy porting, a bigger valve seat and hammer weight the Michal plenum makes more power at a lower reg pressure than I've seen from the pp. (Hammer weight and bigger valve also included with pp kit)