There's a trick with the K7/K8 insulators, in that you can use 2x each of the two NOS parts that are available. Whichever ones you can still buy, you mount in the correct position. The other two can be rotated 180* over and function properly for the other two cylinders. Apparently Honda figured this out a long time ago, and instead of continuing to produce spares for each of the four cylinders, they only produced the insulators for two, as they are nearly identical once flipped over. Probably irrelevant to this thread but maybe useful to someone else.