with the standard sump/baffles i think its more about oil surge. and thats with any pump, including the stocker. once u start makin power and launchin forward at silly g's the oil dont wanna stay still. which is why u must use more oil, 6-6.2l to stop it. and yeah ^^ once u reach 8.5 bar the relief valve opens anyway (in my nitto). and with a nitto if the high pressure it not needed, take the inner spring out and at 6 bar its gonna piss back into the sump. if your oil returns can beat your oil restrictor with flow, your sweet.