port and spark timing differnces
 

Hi, I was curious about he intake and exhaust timing and port shape of the different 13b's. What about spark plug timing? INtake port shape and timing?

Which housing combinations are interchangable? I tried searching, but just got this http://www.banzai-racing.com/faq_housings_ID.htm . I was looking for a little bit more info than that. THanks