NGK Spark Plug, KTM 17-19 450 EXC-F/500 EXC-F, 14-23 250 EXC-F, 17-23 350 EXC-F, Husqvarna 17-19 FE 450/FE 501, 17-23 FE 250, 17-23 FE 350

The NGK Sparkplug is the workhorse at the heart of smooth-running engines around the world.
OEM quality.
Consistent performance.
Plug of choice in millions of vehicles.
NGK is the world's largest supplier of OEM spark plugs.
Tolerances are so close that the margin for error is near zero.