Originally Posted by bbond105
Iím not sure on this but I think the billet rotor is more of an hp thing than RPM. Someone please correct me if I am wrong. I am 445 wrhp with a stock rotor and I have not had any issues. It is probably good insurance if you want to spend the extra $.
It's mostly a Pressure+RPM thing, The more pressure the pump makes....The more stress is exerted on the Rotor, Vanes, & Pump Rings.
A stock 10 Vane Rotor is pretty stout but **** happens, $165 is pretty cheap for piece of mind!