NGK 9198 CPR7EAIX-9 Iridium IX Spark Plug, Pack of 4

Provides a nice smooth idle, and gets you a more consistent redline with complete fuel burn. Produces up to 23% more vroom.

I got it fast and fine

They fit a 2013 Yamaha vstar 950 smooth idle now I'm happy. Update:... Its been a year with them in their still feels good.

I have been using iridium sparkplugs in my 1987 Honda Shadow for years, and have yet to change the first set, which has kept it running smoothly perhaps far beyond its normal useful life (and at 78,000+ miles it still runs well.) Recently I bought a new Yamaha Bolt and installed these iridium plugs, even though I probably could have run the non-iridium OEM plugs for a few years. I just like the smooth engine response that iridium plugs give the engine.

Excellent

Es un producto muy difícil de encontrar en México, lo compré a un excelente precio y la calidad ni se diga. Tuve una notable mejora en el rendimiento de combustible.

bon prix