Some came with constrained production head P8R which had 33mm consumption valves (normally uncovered on VTEC B-series) vs 31mm consumption (non VTEC B collection), and the head had an 84mm shrouding vs 81mm for all other B sequence heads.Inner-to outer rotor radial clearancePump entire body-to outer rotor radialclearancePump human body to-rotor axi