[quote="drmini ]
pic of the Nissan one- (used by guys on the Sth Africa forum)
My USA ones look the same but the top is blue.

[/quote]
the honda BA18 engine valve seals are the same. They have a locking ring that fits the groove in the valve guide. The honda has two seals, one is a wiper seal on the top and the inner one is desiged to stop any oil into the guide and any blow by between the stem and guide on the exhaust valves. They are vitron and the upper seal has a teflon compound.
when fitted the top of the seal is only about 3mm above the top of the guide .
I get a full set of seals [does two mini heads] from Autopro and the last set I got cost $28
if you need "K" type guides the same heads guides are about .003" bigger in OD and need about 3/16" machined off the top and they are exactly the same as mini. The groove for the seal is then spot on for height.
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