Some arrived with confined output head P8R which experienced 33mm intake valves (Ordinarily observed on VTEC B-series) vs 31mm consumption (non VTEC B series), and the head had an 84mm shrouding vs 81mm for all other B series heads. Even crazier is that this engine still has massive tuning possible, https://b16b-type-r44310.blogginaway.com/40532705/top-b16b-secrets