⚡ Ignite your drive with Autolite’s copper spark – where power meets precision!
The Autolite 3924 Copper Resistor Spark Plug features a full copper core electrode for enhanced thermal conductivity, a heat-fused internal seal for leak-proof durability, and a copper-glass seal bonding for optimal voltage delivery. Engineered with precision rolled threads and a cold-formed steel shell, it ensures reliable fit and performance. Ideal for quick starts, improved fuel efficiency, and smooth acceleration, this spark plug is a trusted choice backed by Autolite’s legacy since 1936.
| Brand | Autolite Iridium Ultra |
| Core Material | Copper |
| Thread Size | RM |
| Top Material Type | Alloy Steel |
| Vehicle Service Type | Motorcycle |
| Global Trade Identification Number | 00009100039248 |
| Automotive Fit Type | Vehicle Specific Fit |
| UPC | 009100039248 |
| OEM Part Number | 3924 |
| Manufacturer | Autolite |
| Model | 3924 |
| Item Weight | 1.44 ounces |
| Product Dimensions | 3.4 x 1.1 x 1 inches |
| Item model number | 3924 |
| Is Discontinued By Manufacturer | Yes |
| Exterior | Machined |
| Manufacturer Part Number | 3924 |
| Position | Center |
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