I dropped off my head to be resurfaced and tanked. The machine shop needs new valve seals before they install my valves. I checked hondaautomotiveparts.com and they list four types of valve seals. Two "Valve A's" & two "Valve B's", im assuming that both a's are the same as are the b's. My question is do I order one set of each A&B?

THanks
Bobby

here is the link, its numbers 4&5

http://www.hondaautomotivepart...82%29