Some arrived with limited production head P8R which had 33mm intake valves (normally discovered on VTEC B-series) vs 31mm ingestion (non VTEC B series), and The top had an 84mm shrouding vs 81mm for all other B series heads. The B16B, found in the iconic Honda Civic Type R, requires https://cristianysnzn.spintheblog.com/40158137/not-known-details-about-jdm-honda-engine