Some came with minimal generation head P8R which had 33mm consumption valves (Typically identified 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 B16 engine discovered its residence in light cars and trucks https://b16motorforsale02345.jts-blog.com/38504191/the-basic-principles-of-b16-engine-for-sale