Some came with constrained creation head P8R which experienced 33mm ingestion valves (Commonly 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. The Honda B16 engine has cemented itself inside the JDM aftermarket https://b16engine24467.newsbloger.com/40437066/what-does-jdm-honda-replacement-engine-mean