Some arrived with minimal production head P8R which had 33mm consumption valves (Usually found on VTEC B-series) vs 31mm consumption (non VTEC B series), and The pinnacle had an 84mm shrouding vs 81mm for all other B series heads. Among the reasons that it is so well-liked within the aftermarket https://jdm-honda-engine42964.blog4youth.com/40320135/considerations-to-know-about-b16b-motor