Can anyone clarify whether you need to up-rate your spark plugs with the high compression conversion? The UL is listed using 7E plugs and the ULS 8E.

A tad confused as my 912 has light blue CH covers, not black and not green.

They were apparently supplied with the high Compression conversion done by the previous owner. I can't seem to locate any literature on the kit or the procedures.

Any light to shed?
Many thanks all
Zeke