---
product_id: 68566183
title: "Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack"
brand: "autolite iridium ultra"
price: "218 zł"
currency: PLN
in_stock: true
url: https://www.desertcart.pl/products/68566183-autolite-ar3910x-ar-high-performance-racing-non-resistor-spark-plug
store_origin: PL
region: Poland
---

# Cut-back electrode for faster ignition 8% cooler side wire temp Nickel-plated corrosion resistance Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack

**Brand:** autolite iridium ultra
**Price:** 218 zł
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your drive with race-ready spark power!

## 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?** 218 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/68566183-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

- • **Race-Proven Durability:** Yttrium-enhanced alloy cuts side wire temp by 8%, extending spark plug life under extreme conditions.
- • **Lightning-Fast Ignition:** Cut-back ground electrode design accelerates flame kernel growth for quicker, more reliable starts.
- • **Corrosion-Resistant Finish:** Nickel plating guards against rust and wear, keeping your ignition system pristine mile after mile.
- • **Trusted Legacy of Excellence:** Backed by over 100 years and 11 billion plugs produced, Autolite delivers race-grade quality for your ride.
- • **Precision Fit for Peak Performance:** Vehicle-specific fit ensures optimal compatibility and maximum engine efficiency.

## Overview

The Autolite AR3910X is a high-performance, non-resistor racing spark plug engineered with a yttrium-enhanced alloy to reduce side wire temperature by 8%, improving durability and reducing pre-ignition. Featuring a cut-back ground electrode for faster flame kernel growth and a corrosion-resistant nickel plating, this 4-pack is vehicle-specific for precise fit and optimal engine performance. Trusted by professional racers and backed by over a century of expertise, Autolite ensures race-grade ignition quality for your car.

## Description

Autolite Racing Spark Plugs are used by many professional race car drivers. These spark plugs contain an Yttrium-Enhanced Alloy, which enables up to 8 percent reduction in side wire temperature for improved durability and less pre-ignition. Autolite racing plugs are available in colder heat ranges than most plug manufacturers to support modified engines and feature a cut background electrode for improved ignitibility and faster flame kernel growth. They are also nickel plated for a long-lasting, corrosion-resistant finish. Since its inception, the Autolite brand has provided the automotive aftermarket and Original Equipment manufacturers the highest quality ignition products. Autolite has been in operation for over 100 years and has produced more than 11 billion spark plugs and glow plugs. These plugs are specifically designed for each application to meet or exceed OE quality and performance. Autolite makes plugs for Japanese, European, and Korean cars as well as plugs for Lawn & Garden and Power Sports. As a leading supplier of spark plugs, the Autolite brand has the right ignition products for your application, regardless of make or model, import or domestic.

## 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 |
|---------------|-------|
| 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 |
| Automotive Fit Type | Vehicle Specific Fit |
| UPC | 009100031105 |
| Manufacturer | FRAM |
| Model | AR3910X-4PK |
| Item Weight | 1.92 ounces |
| Product Dimensions | 1.4 x 0.45 x 0.16 inches |
| Item model number | AR3910X-4PK |
| Is Discontinued By Manufacturer | No |
| Exterior | Chrome |
| Manufacturer Part Number | AR3910X-4PK |
| Position | Center |

## 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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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-02-03*