Some arrived with constrained generation head P8R which experienced 33mm intake valves (Usually located on VTEC B-series) vs 31mm consumption (non VTEC B series), and The top had an 84mm shrouding vs 81mm for all other B series heads. The B16B is like a shorter stroke equal on the B18 https://b16motorforsale46790.yomoblog.com/46909165/the-b16-engine-for-sale-diaries