Some came with limited production head P8R which experienced 33mm consumption valves (Generally identified on VTEC B-series) vs 31mm ingestion (non VTEC B series), and the head had an 84mm shrouding vs 81mm for all other B series heads. The Honda B16 engine has cemented by itself from the JDM https://b16-engine-for-sale89753.madmouseblog.com/20511277/a-review-of-honda-b16b