Some came with restricted manufacturing head P8R which experienced 33mm consumption valves (Typically located on VTEC B-series) vs 31mm intake (non VTEC B series), and the head experienced an 84mm shrouding vs 81mm for all other B series heads. Rakhmat Darmawan/Shutterstock When you are creating a challenge tuner motor vehicle https://b16btyperengineforsale08551.blogadvize.com/48089142/the-basic-principles-of-b16-engine-for-sale