Review on NGK (6341) BKR5EIX Iridium IX Spark Plug: Enhanced Performance and Durability, Pack of 1 by Dave Hersma

I use these spark plugs in my 18hp Vanguard engine. They are made in Japan and have a gap of 0.030. This suits my needs and should last much longer than standard plugs that are rated for 100 hour intervals. FYI, when you see bad reviews, they're from people who haven't researched what type of fork is required to apply them. These geniuses decide to write a negative review about a product when it's their own fault. Buy with confidence. If it fits your engine, you will be happy with the purchase. My 0.02 cents.