Some came with confined production head P8R which experienced 33mm intake valves (Usually found on VTEC B-series) vs 31mm ingestion (non VTEC B series), and the head had an 84mm shrouding vs 81mm for all other B series heads. The B16B is sort of a shorter stroke equivalent on the https://ricardoooorf.activablog.com/38873959/the-best-side-of-b16a2