NGK Standard Spark Plug Box of 10 (BMR4A)

The pure alumina silicate ceramic insulator in these NGK spark plugs is a key detail, offering superior strength and better heat transfer compared to standard ceramic. This is part of why NGK has been a go-to for OE applications for so long. You get a box of 10 BMR4A plugs, which is handy if you're working on an engine that needs a full set and you want them all to be the same age and wear level.

NGK uses a solid 98% pure copper core, which is excellent for dissipating heat away from the combustion chamber and also helps with conductivity. This contributes to the wide heat ranges these plugs can handle. The trivalent metal plating on the exterior is a practical touch, giving them superior anti-corrosion and anti-seizing properties. This means they'll be easier to install and remove down the road, which is always a plus during maintenance.

These plugs are built for longer life and consistent performance. The corrugated ribs on the insulator help prevent flashover, and the triple gasket sealing ensures there are no combustion gas leaks. It's a well-built plug that offers reliable performance for many applications.