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The Denso Iridium Spark Plug (ZXE27HBR8) is the first automotive plug to use DENSO’s patented iridium alloy, setting a new standard for modern high-tech engines.
Built with a revolutionary 360 dgree laser welding process, this spark plug offers extreme durability, being six times harder and eight times stronger than conventional platinum plugs. It delivers more horsepower, faster starts, fewer misfires under heavy loads, and improved fuel efficiency.
Factory-installed on luxury vehicles from automakers like GM, Toyota, Honda, and Mitsubishi, the plug features a 0.7mm iridium center electrode that dramatically improves ignitability and longevity, paired with a platinum ground electrode for extended life.
| Spark Plug | with resistor |
| Spark Plug | 3 - Earthed Electrode |
| Spark Plug | Iridium Middle Electrode |
| Electrode Gap [mm] | 0,8 |
| Thread Size | M12x1.25 |
| Thread Length [mm] | 26,5 |
| Diameter [mm] | 12 |
| for OE number | 22401AA801 |
| Connector type | Solid SAE |
| Spanner Size | 14 mm |
| Tightening Torque [Nm] | 17 |
| Weight [g] | 47 |
| Gross Weight [g] | 50 |
| alternative item | VXEBH27 |
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