GL1800 NGK Spark Plugs

NGK are great spark plugs. Use them in all my engines.

The best on the market

I gapped the new plugs at 40, then removed the old plugs and found that they were far greater than 40 (about 60). I haven't taken it for a ride yet, but I'm hoping for a difference. I have 38,000 miles on my 2008 GL1800, and I'm sure this was the first plug change. Removing the old ones and installing the new ones, was easy - getting to them was a different story.