NGK PREMIUM RX is a performance grade higher than the original stock NGK Iridium or Denso Iridium spark plugs. It is the world's first with new precious metallic material "ruthenium" for the compounding center electrode" and an "oval shaped" outer electrode.
These spark plugs also feature a brass terminal nut with very low impedance (Ohm), in the same way as NGK and Denso Iridium Racing series (NGK IRI-Series Denso Iridium IK Series), with a completely revised insulator that provides greater heat dissipation and leave more space for cleaner and complete combustion.
Benefits of NGK PREMIUM RX vs. NGK PLATINUM & DENSO IRIDIUM)
- Performance Gain
- Increased longevity of 20 to 40%
- Increased longevity up to 2X
- Ruthenium undisputed benefits on stability of the ignition and corrosion resistance
- Cleaner combustion / reduced polluting emissions
- Better chamber compression
- Better compression (small diameter electrodes / innovative insulation design)
- Increased horsepower
- Firmer accelerations with more linearity
- Service life of 80,000 km to 100,000 km
- Optimized ignition / less misfires
- Less emissions / less unburned fuel
- Better fuel economy with a much more stable ignition
- Better heat dissipation at an equal thermal index
- Extended ground electrode & reinforced platinum implant
- More stable idling with reduced vibration at high rpm
- Easy starts in all weather and all conditions of use
- Stability and durability in the long term
Comes in a pack of 4 or 6 custom engineered pieces depending on your engine type for convenience. Quality product made in Japan.
(Optional installation can be done by our local Misumi Kaizen Partner for a separate small fee)