Some arrived with limited production head P8R which had 33mm ingestion valves (Typically found on VTEC B-sequence) vs 31mm ingestion (non VTEC B series), and The top had an 84mm shrouding vs 81mm for all other B sequence heads.B18 and B16 engines are both equally B-collection engines. Let's Examine them head to head. To begin, allow us to get a mor