None, just as they don't in the IT regs...IIDSYCTYC.Theoretical question: what do the regs say about leaving the OE pump in place and adding an external one?
Greg Amy: My reasoning for the external oil pump is that the stock pump does not have factory or aftermarket gears available that will increase volume and pressure. While there are means to adjust the pressure nothing available for volume increase unless an external single/two stage pump is allowed. This is for a mid engine Toyota.