I would say the system is just a "Mini Flywheel," you still mount on a chunk of aluminum (not steel like stocker, of course), only difference is its small, light, and has no key. I can't find the link right now but there are dyno sheets that show the difference in the power curve, much improved over stock for drag racing, as the power is made more-so on the top end. I cannot vouch personally yet as I have one but have not ran it yet, I'll keep you posted for sure. By the way, PVLs are trick as shit! Gregrob have you ever owned one?