Why not?
It's for ported racing engines because they make their power in the higher rpm range. They also have modifications that allow them to safely run at high rpms, such as lightened rotors, balanced rotating assemblies, locked rotor gears, clearanced rotors, high-rpm flywheel, oil system modifications, etc.



Is it because of boost levels? Rtek can make the rev limit in a t2 go above 8K. That cant be good can it?