Some arrived with restricted output head P8R which experienced 33mm ingestion valves (Ordinarily observed on VTEC B-series) vs 31mm consumption (non VTEC B series), and The top had an 84mm shrouding vs 81mm for all other B series heads. Even crazier is this engine even now has substantial tuning probable, https://messiahhnfpv.dsiblogger.com/72770058/the-5-second-trick-for-jdm-honda-replacement-engine