Some arrived with restricted generation head P8R which experienced 33mm ingestion valves (normally identified on VTEC B-series) vs 31mm intake (non VTEC B series), and the head experienced an 84mm shrouding vs 81mm for all other B series heads. The B16 engine found its residence in light-weight cars and trucks https://b16-motor-for-sale69123.onesmablog.com/the-definitive-guide-to-b16-crate-engine-80880624