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โก Ignite your engineโs full potential with Autolite AR3910!
The Autolite AR3910 High Performance Racing Spark Plug is engineered for professional-grade durability and ignition efficiency. Featuring a yttrium-enhanced alloy that cuts sidewire temperature by 8%, a colder heat range for modified engines, and a corrosion-resistant nickel plating, this spark plug delivers reliable, long-lasting performance trusted by race car drivers worldwide.





| Brand | Autolite Iridium Ultra |
| Core Material | Nickel |
| Thread Size | 14mm |
| Top Material Type | Nickel |
| Vehicle Service Type | Car |
| Global Trade Identification Number | 00009100017802 |
| Automotive Fit Type | Universal Fit |
| UPC | 009100017802 |
| OEM Part Number | AR3910 |
| Manufacturer | Autolite |
| Model | AR3910 |
| Item Weight | 0.32 ounces |
| Product Dimensions | 1 x 1 x 3.38 inches |
| Item model number | AR3910 |
| Is Discontinued By Manufacturer | Yes |
| Manufacturer Part Number | AR3910 |
| Position | Front, Rear |
M**F
Five Stars
great plug for racing motors folks
N**N
Five Stars
Ok good
M**A
Great plugs
NGK all the way. Only plugs I use. Had problems with other plugs. Never with NGK. Highly recommend for for everything.
Trustpilot
2 weeks ago
2 months ago