The Dinan Iridium Spark Plug uses an iridium electrode with a copper core to run cooler, resist preignition, and fire reliably at lower required voltage than a standard plug. Rated at heat range 9 and one step colder than OEM on Gen 1 B48, Gen 1/2 B58 and S58 engines, it suits tuned and stock setups alike and pairs well with Dinan ignition coils. The projected ceramic insulator and optimized electrode design help ignite hard-to-burn fuels such as ethanol. Sold individually.
Specifications
| Type | Iridium spark plug |
| Heat Range | 9 (equivalent Bosch 3, Brisk 10, Champion 4, Denso 27, NGK 9) |
| Material | Iridium electrode with copper core |
| Insulator | Ceramic, projected design |
| Seat Type | Flat |
| Terminal Type | Cup |
| Dimensions | 12mm thread diameter x 26.5mm reach x 14mm Bi-Hex hex |
| Supplied Gap | 0.5mm |
| Install Torque | 17 Nm |
| Engines | B48 / B58 / S58 (1 step colder than OEM) |
| Quantity | 1 (sold individually) |
| Part Number | D640-0001 |
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