Some came with restricted creation head P8R which had 33mm consumption valves (Commonly observed on VTEC B-series) vs 31mm ingestion (non VTEC B series), and The pinnacle experienced an 84mm shrouding vs 81mm for all other B series heads. Certainly one of the reasons that it's so common while in https://b16motorforsale17694.ageeksblog.com/38314878/the-fact-about-b16a2-that-no-one-is-suggesting