Review on NGK SILZKAR7B11 - Get the Best 🔥 Performance and Longevity with NGK Laser Iridium Spark Plugs by Tyrone Lyons

These were the same spark plugs that I pulled from my Subaru. They ended up with a gap within the spec range (mine was about 0.041 inch). Subaru recommends changing every 60,000 miles (at least on my model) and I've changed about 62,000. The ones that came out weren't in bad shape, but they weren't like new either. Apart from overcoming the obstacles caused by the horizontal engine, they install easily and work like new again (at the same time I made an air intake filter). No complaints, $40 (4 plugs) every 3-4 years for maintenance costs isn't bad. If they match your car, especially Subaru, feel free to take them.