---
product_id: 354766490
title: "Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack"
brand: "autolite iridium ultra"
price: "$U1096"
currency: UYU
in_stock: true
url: https://www.desertcart.uy/products/354766490-autolite-ar3910x-ar-high-performance-racing-non-resistor-spark-plug
store_origin: UY
region: Uruguay
---

# Cut-back ground electrode for superior ignitability Large ground electrode enhances heat transfer Anti-corrosive nickel plating for durability Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack

**Brand:** autolite iridium ultra
**Price:** $U1096
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your engine’s full potential with race-ready spark plugs!

## Quick Answers

- **What is this?** Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack by autolite iridium ultra
- **How much does it cost?** $U1096 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/354766490-autolite-ar3910x-ar-high-performance-racing-non-resistor-spark-plug)

## Best For

- autolite iridium ultra enthusiasts

## Why This Product

- Trusted autolite iridium ultra brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Nickel plating resists corrosion, extending spark plug lifespan
- • **Superior Heat Management:** Large ground electrode dissipates heat efficiently to prevent misfires
- • **Race-Proven Ignition Power:** Trusted by professional drivers for peak performance on the track
- • **Precision Fit for Your Ride:** Vehicle-specific design guarantees seamless installation and optimal performance
- • **Optimized Flame Kernel Ignition:** Cut-back ground electrode ensures faster, more reliable spark

## Overview

The Autolite AR3910X 4-pack high performance racing spark plugs feature a cut-back ground electrode for improved ignitability, a large ground electrode for enhanced heat transfer, and anti-corrosive nickel plating for durability. Designed for vehicle-specific fit, these spark plugs are trusted by professional drivers to deliver reliable, high-performance ignition and extended lifespan.

## Description

Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack

## Features

- Package Dimensions: 10.795 H x 2.997 L x 8.991 W (centimetres)
- Package Weight: 0.181 kilograms
- Country of Origin : Mexico
- Features cut back ground electrode for improved ignitability of flame kernel
- Fit type: Vehicle Specific

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Autolite |
| Brand | Autolite Iridium Ultra |
| Model | AR3910X-4PK |
| Product Dimensions | 3.56 x 1.14 x 0.41 cm; 54.43 g |
| Item model number | AR3910X-4PK |
| Exterior | Chrome |
| Manufacturer Part Number | AR3910X-4PK |
| Position | Center |
| Item Weight | 54.4 g |

## Product Details

- **Brand:** Autolite Iridium Ultra
- **Core material:** Nickel
- **Thread size:** 14mm X 1.25
- **Top material type:** Alloy Steel
- **Vehicle service type:** Car

## Images

![Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack - Image 1](https://m.media-amazon.com/images/I/71Bq-jTkqeL.jpg)
![Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack - Image 2](https://m.media-amazon.com/images/I/81Qh3Rx2YFL.jpg)
![Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack - Image 3](https://m.media-amazon.com/images/I/81qS1Ks6FcL.jpg)
![Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack - Image 4](https://m.media-amazon.com/images/I/71Jo61loCbL.jpg)
![Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack - Image 5](https://m.media-amazon.com/images/I/81C0GaELbSL.jpg)

## Questions & Answers

**Q: This spark plug makes my Predator - 212cc engine run very hot compared to a standard spark plug, is it normal to gain 30+ temps using this plug?**
A: It can increase the heat of the engine if you only have stock parts, and could overheat it. I have a bigger fuel jet to let more fuel in, odd as it may seem, more gas cools the engine. These plugs burn basically all the gas that goes in, thus it will get hotter. I would recommend a larger fuel jet, mine hasn't overheated since I got one...Gives a noticeable amount more power as well (Gave my 500 pound go kart 10mph more speed).     ;)

**Q: What size plug wrench does this plug take?**
A: 11/16

**Q: How much longer are these compared to NGK race plugs extened tip ?**
A: Same

**Q: Does it increase horse power**
A: It’s more about slightly increasing compression do to plug design lowering the cc’s in the head!   It’s true!

## Frequently Bought Together

- Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack
- Autolite AR3933X-4PK High Performance Racing Non-Resistor Spark Plug, 4 Pack

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-01-24*