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

 

You need a set of A's and a set of B's. The A's are for the intake side, and the B's are for the exhaust side.

You can also distinguish b/w the IN and EX sides by looking at the spring color on the valve stem seal. IN - white, EX - black.