- Brand: NGK
- Core Material: Iridium
- Top Material Type: Metal
- Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior
- The 0.6mm laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect
- Longer insulator nose, the corrugated ribs on insulator, and a triple gasket seal eliminates combustion gas leakage
- Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today’s high-performance engines
- Trivalent metal plating has superior anti-seizing properties
















Amazon Customer –
I replaced a stock ngk with this one and im pleased. The other plug wasn’t firing as well as my motorcycle would sometimes die while idling. This iridium plug hasn’t let me down yet. It was an immediate difference.
P. –
My quad started misfiring while riding it so I logged on and ordered this spark plug. You have to unscrew the top part in order for it to fit on the coil properly. I thought I ordered the wrong one. Nothing a pair of pliers and socket can’t fix. My quad is now running strong with no issues
Mike –
Work fine haven’t had them to long but seem good
Paxo –
Replaced the old plugs in the bike and it runs well. I can’t review longevity or mileage as they have only been installed recently.I have so far done around 130 miles and all is good.
Aron –
Seems good. The gaps were correct and consistent when they arrived.
Sam Deep –
I’ll be swapping out all my plugs to these. Every little bit of efficiency improvement is huge with the current price of fuel. #FJB
Doug Hinton –
Put these in a 2012 Yamaha Roadliner/Stratoliner. When I pulled the old plugs, the top of one of them was actually bent. Went with iridium, do not want to have to do this again for a long time. Bike runs well. Would recommend.
Tre –
As described