⚡ Ignite your engine’s full potential with Autolite Racing Spark Plugs!
Autolite AR3923-4PK Racing Spark Plugs deliver professional-grade ignition with a colder heat range and yttrium-enhanced alloy for 8% cooler side wire temperatures. Featuring a cut-back ground electrode for faster flame kernel growth and nickel plating for corrosion resistance, these plugs are engineered for modified engines and intense racing conditions.
| Brand | Autolite Iridium Ultra |
| Core Material | Nickel |
| Thread Size | 14mm |
| Top Material Type | Nickel |
| Vehicle Service Type | Car |
| Global Trade Identification Number | 00009100026576 |
| UPC | 009100026576 |
| Manufacturer | Autolite |
| Model | AR3923-4PK |
| Item Weight | 1.6 ounces |
| Product Dimensions | 1 x 1 x 3.38 inches |
| Item model number | AR3923-4PK |
| Is Discontinued By Manufacturer | Yes |
| Exterior | Chrome |
| Manufacturer Part Number | AR3923-4PK |
D**L
great spark plugs
we put the plugs in the race truck every year great plugs
D**D
Preferred plug for SBF w AFR185s & 100 shot
Recommended by AFR, run them with no issues on NX 100 shot gapped at .035. The cut back ground strap and nickel plating are nice. The nickel plating with just a little anti seize makes removal a non-issue from aluminum cylinder heads. Recommend grabbing them when the price is right, sometimes it’s same or better than the standard 392X Autolites.
K**N
Five Stars
AAA
M**R
Did not fit vehicle
Did not fit?
1**Y
plugs
fast shipping and good price
2**W
Great job thank you
Great job thank you
Trustpilot
5 days ago
4 days ago
