the 18RGU in my old celica didn't have a lobe on the auxillary shaft it had a plate on it! so i couldn't put a mechanical pump on it!!! resorted to a leccy one..but that motor didn't last very long anyway so got a couple of 18RG's i had lying around mixed n matched good head on this..this in that etc..the motor is now going into my lux..and i have already thought of the air filter problem and sketched up a box i'm making once its in there so i can get the dimensions just right!