Review on NGK 92491 Spark Plug by Kevin Greer
Pretty good. Distance constant but not exact
ordered 6 plugs which are said to be up to .044" apart. They all came up to .0405" apart after my Starrett 66B. It's probably not a big deal, but it's a bit of a shame for the excellent quality of the rest of the fork. The Denso spark plugs for my other car also had the same 0.0035 inch gap. The accuracy of my Starrett was tested to within 0.0001 inch using a micrometer and ASME Class 00 gauge blocks. The tips have very small laser welded platinum and iridium plates that are very brittle.
- Absolutely amazing!
- infuriates
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