






⚡ Ignite your drive with Autolite’s copper core power!
Autolite 104-4PK Copper Resistor Spark Plugs feature a full copper core electrode for enhanced thermal conductivity, a leak-proof copper-glass seal for durability, and a resistor to reduce radio frequency interference. Designed for quick starts, better fuel economy, and smooth acceleration, these plugs are precision-engineered with a cold-formed steel shell and multi-rib insulator to prevent misfires. Trusted since 1936, Autolite delivers reliable performance and lasting value in every pack of four.
| Brand | Autolite Iridium Ultra |
| Core Material | Copper |
| Thread Size | 14mm |
| Top Material Type | Alloy Steel |
| Vehicle Service Type | Snowmobile, UTV, Van, Watercraft |
| Global Trade Identification Number | 00009100520838 |
| UPC | 009100520838 |
| Manufacturer | FRAM |
| Model | 104-4PK |
| Product Dimensions | 2.54 x 2.54 x 8.59 cm; 181.44 g |
| Item model number | 104-4PK |
| Exterior | Chrome |
| Manufacturer Part Number | 104-4PK |
| Position | Center |
| Colour | Neutral |
| Assembly Required | No |
| Manufacturer | FRAM |
| Country of Origin | USA |
| Item Weight | 181 g |
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