NGK BPR 6 ES Spark Plug, for Honda GX160 to GX390

NGK is the world's leading manufacturer of spark plugs. NGK spark plugs guarantee the highest quality and are used by many Japanese and European motorcycle manufacturers. State-of-the-art production facilities, significant investments in research and development, and a strong commitment to motorsports—from Formula 1 to motorcycle racing—are what make NGK spark plugs so successful.  Details: B = Thread diameter: 14.0 mm, wrench size: 20.8 mm R = with anti-interference resistor (5 kOhm) 8-11 = heat range 8 = cold, winter weather (up to approx. 15 degrees) 9 = normal temperatures, rain (up to approx. 20 degrees) 10 = Summer weather (20 degrees and above) 11 = Hot summer weather (25–35 degrees) E = Thread length: 19.0 mm  G = with nickel electrode   CAUTION:Spark plugs should be installed using a suitable torque wrench to ensure proper installation.To prevent damage to the spark plug or engine caused by improper installation, tighten them to the following values:Aluminum cylinder head = 25–30 NmCast iron cylinder head = 25–35 Nm