---
product_id: 388324726
title: "Autolite AR3923-4PK High Performance Racing Resistor Spark Plug, Pack of 4"
brand: "autolite iridium ultra"
price: "€ 63.12"
currency: EUR
in_stock: true
url: https://www.desertcart.de/products/388324726-autolite-ar3923-4pk-high-performance-racing-resistor-spark-plug-pack
store_origin: DE
region: Germany
---

# 8% cooler side wire temp Colder heat range for mods Nickel anti-corrosion plating Autolite AR3923-4PK High Performance Racing Resistor Spark Plug, Pack of 4

**Brand:** autolite iridium ultra
**Price:** € 63.12
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your engine’s full potential with Autolite Racing Spark Plugs!

## Quick Answers

- **What is this?** Autolite AR3923-4PK High Performance Racing Resistor Spark Plug, Pack of 4 by autolite iridium ultra
- **How much does it cost?** € 63.12 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/388324726-autolite-ar3923-4pk-high-performance-racing-resistor-spark-plug-pack)

## 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

- • **Ignition Precision Boost:** Cut back ground electrode improves flame kernel ignitability for faster, cleaner combustion.
- • **Corrosion-Resistant Finish:** Nickel plating ensures rust-free performance even under extreme conditions.
- • **Race-Ready Heat Management:** Colder heat range designed to handle high-performance engine mods and intense racing conditions.
- • **Trusted Legacy Performance:** Backed by Autolite’s 100+ years and 11 billion spark plugs of proven racing pedigree.
- • **Yttrium-Enhanced Durability:** Up to 8% reduction in side wire temperature for longer life and less pre-ignition risk.

## Overview

Autolite AR3923-4PK High Performance Racing Resistor Spark Plugs feature a colder heat range and yttrium-enhanced alloy that reduces side wire temperature by 8%, improving durability and minimizing pre-ignition. Their cut back ground electrode design enhances flame kernel ignitability, while nickel plating protects against corrosion. Trusted by professional racers and backed by over a century of expertise, these plugs deliver reliable, high-performance ignition for modified and racing engines.

## 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

- 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
- Features cut back ground electrode for improved ignitability of flame kernel
- Coated in an anti-corrosive nickel plating to prevent rusting
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Autolite |
| Brand | Autolite Iridium Ultra |
| Model | AR3923-4PK |
| Product Dimensions | 2.54 x 2.54 x 8.59 cm; 45.36 g |
| Item model number | AR3923-4PK |
| Exterior | Chrome |
| Manufacturer part number | AR3923-4PK |
| Position | Centre |
| Item Weight | 45.4 g |

## Product Details

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

## Images

![Autolite AR3923-4PK High Performance Racing Resistor Spark Plug, Pack of 4 - Image 1](https://m.media-amazon.com/images/I/71Bq-jTkqeL.jpg)
![Autolite AR3923-4PK High Performance Racing Resistor Spark Plug, Pack of 4 - Image 2](https://m.media-amazon.com/images/I/81Qh3Rx2YFL.jpg)
![Autolite AR3923-4PK High Performance Racing Resistor Spark Plug, Pack of 4 - Image 3](https://m.media-amazon.com/images/I/81qS1Ks6FcL.jpg)
![Autolite AR3923-4PK High Performance Racing Resistor Spark Plug, Pack of 4 - Image 4](https://m.media-amazon.com/images/I/71Jo61loCbL.jpg)
![Autolite AR3923-4PK High Performance Racing Resistor Spark Plug, Pack of 4 - Image 5](https://m.media-amazon.com/images/I/81C0GaELbSL.jpg)

## Available Options

This product comes in different **Number of Items** options.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.de/products/388324726-autolite-ar3923-4pk-high-performance-racing-resistor-spark-plug-pack](https://www.desertcart.de/products/388324726-autolite-ar3923-4pk-high-performance-racing-resistor-spark-plug-pack)

---

*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-03-03*