Here are the specs on the GP's. Looks like it is correct if you go to "Specifications"
https://www.ngk.com/ngk-2031-y-103v-glow-plug
Here is the kit the pro's use. Looks like it seals on the face of the adapter.
https://www.harborfreight.com/master...kit-57588.html
__________________
This ain't no hobby....it's an addiction
|