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Warranty
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Bosch Silver Spark Plugs are engineered for older European performance cars, as well as some motorcycle applications. These types of vehicle engines operate at particularly high combustion chamber temperatures, increasing the wear on the electrodes. Bosch uses silver alloys in the center electrode tip to resist wear and improve spark plug efficiency.
| Ground Electrode Quantity | 1 |
| Thread Diameter | 14 mm |
| Filament Quantity | OE Quality |
| Insulator Type | Projected |
| Spark Plug Reach | 19 mm |
| Sub Brand | Silver |
| VMRS Code | 033003000 |
| Quality Level | Specialty |
| Spark Plug Heat Range | BOSH9 |
| Electrode Design | Standard |
| Seat Type | Flat |
| Manufacturer | Bosch |
| Style | 4-Cycle |
| Resistor Type | Yes |
| Spark Plug Hex Size | 20.8 mm |
| SDS Required | No |
| Ground Electrode Tip Design | Standard |
| Electrical Terminal Type | Removable Nut |
| Manufacturer Part Number | WR9LS |
| Terminal Type | Removable Nut |
| Spark Plug Seat Type | Flat |
| Thread Size | 14 mm |
| Brand | Bosch |
| Resistance | 6 kΩ |
| Spark Plug Thread Size | 14 mm |
| Contents | (1) Spark Plug |
| Gap Size | 0.7 mm |
| Insulator Material | Ceramic |
| Spark Plug Resistor | Yes |
| Grade Type | OE Style |
| Hex Size | 20.8 mm |
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