---
product_id: 558123567
title: "Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack"
brand: "autolite iridium ultra"
price: "$306745"
currency: COP
in_stock: true
category: "Autolite Iridium Ultra"
url: https://www.desertcart.co/products/558123567-autolite-ar3910x-ar-high-performance-racing-non-resistor-spark-plug
store_origin: CO
region: Colombia
---

# 8% cooler side wire temp Colder heat range for mods Nickel-plated corrosion resistance Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack

**Brand:** autolite iridium ultra
**Price:** $306745
**Availability:** ✅ In Stock

## Summary

> 🏁 Ignite your engine’s true potential with Autolite AR3910X!

## 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?** $306745 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/558123567-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

- • **Durability Boost:** Yttrium-enhanced alloy cuts side wire temperature by 8%, reducing pre-ignition
- • **Long-Lasting Finish:** Nickel plating ensures corrosion resistance and extended spark plug life
- • **Race-Proven Performance:** Trusted by professional drivers for peak racing power
- • **Faster Ignition Response:** Cut background electrode accelerates flame kernel growth for quicker starts
- • **Optimized Heat Management:** Colder heat range plugs designed to handle high-performance engine mods

## Overview

The Autolite AR3910X 4-pack racing spark plugs feature a Yttrium-enhanced alloy that reduces side wire temperature by 8%, supporting durability and preventing pre-ignition. Designed with colder heat ranges for modified engines, these nickel-plated plugs deliver faster ignition and corrosion resistance, making them a top choice among professional racers and performance enthusiasts.

## Description

Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack : desertcart.in: Car & Motorbike

## Features

- Replacement racing spark plug used by many professional car drivers
- Specifically designed with colder heat ranges than the factory plug to enable performance modifications and handle intense conditions
- Contains an Yttrium-enhanced alloy to enable up to 8% reduction in side wire temperature for improved durability and less pre-ignition

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Autolite Iridium Ultra |
| Core Material | Nickel |
| Thread Size | 14mm X 1.25 |
| Top Material Type | Alloy Steel |
| Vehicle Service Type | Car |
| Global Trade Identification Number | 00009100031105 |
| UPC | 009100031105 |
| Manufacturer | FRAM |
| Model | AR3910X-4PK |
| Product Dimensions | 3.56 x 1.14 x 0.41 cm; 54.43 g |
| Item model number | AR3910X-4PK |
| Manufacturer Part Number | AR3910X-4PK |
| Position | Center |
| Colour | Neutral |
| Assembly Required | No |
| Manufacturer | FRAM |
| Country of Origin | USA |
| 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)

## 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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**Shop now:** [https://www.desertcart.co/products/558123567-autolite-ar3910x-ar-high-performance-racing-non-resistor-spark-plug](https://www.desertcart.co/products/558123567-autolite-ar3910x-ar-high-performance-racing-non-resistor-spark-plug)

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*Product available on Desertcart Colombia*
*Store origin: CO*
*Last updated: 2026-02-21*