







⚡ Spark your engine’s true potential with Autolite Copper Core!
The Autolite 3924 Copper Resistor Spark Plug features a full copper core electrode for enhanced thermal conductivity, a leak-proof copper-glass seal, and precision rolled threads for durability and perfect fit. Designed to improve fuel efficiency, quick starts, and smooth acceleration, it’s a trusted choice backed by decades of Autolite innovation.

| Manufacturer | Autolite |
| Brand | Autolite Iridium Ultra |
| Model | 3924 |
| Product Dimensions | 8.64 x 2.79 x 2.54 cm; 41 g |
| Item model number | 3924 |
| Exterior | Machined |
| Manufacturer part number | 3924 |
| OEM Part Number | 3924 |
| Position | Centre |
| Item Weight | 41 g |
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