---
product_id: 20323951
title: "ACDelco Professional 41-121 (55585517) Iridium Spark Plug (Pack of 1)"
brand: "acdelco"
price: "3408 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Ac Delco"
url: https://www.desertcart.is/products/20323951-acdelco-professional-41-121-55585517-iridium-spark-plug-pack-1
store_origin: IS
region: Iceland
---

# Iridium fine-wire electrode for quick ignition High melting point for superior durability One-piece suppressor seal blocks radio interference ACDelco Professional 41-121 (55585517) Iridium Spark Plug (Pack of 1)

**Brand:** acdelco
**Price:** 3408 kr
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your ride with precision and power — don’t get left in the dust!

## Quick Answers

- **What is this?** ACDelco Professional 41-121 (55585517) Iridium Spark Plug (Pack of 1) by acdelco
- **How much does it cost?** 3408 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/20323951-acdelco-professional-41-121-55585517-iridium-spark-plug-pack-1)

## Best For

- acdelco enthusiasts

## Why This Product

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

## Key Features

- • **Unmatched Durability:** High melting point iridium core resists wear for consistent, long-lasting performance
- • **Engine Longevity Boost:** Fine-wire design burns away carbon deposits, extending spark plug life
- • **OEM-Grade Fit & Finish:** Exact replacement for your vehicle’s original spark plug, pre-gapped for hassle-free installation
- • **Precision Ignition Power:** Iridium electrode ensures rapid cold starts and smooth acceleration
- • **Interference-Free Performance:** Suppressor seal blocks radio frequencies, protecting sensitive vehicle electronics

## Overview

The ACDelco Professional 41-121 Iridium Spark Plug delivers OEM-quality performance with a durable iridium core, fine-wire electrode for efficient combustion, and a suppressor seal that prevents electronic interference. Designed for motorcycles and other vehicles, it ensures smooth idling, quick starts, and long-lasting reliability backed by a 7-year warranty.

## Description

ACDelco Professional Iridium Spark Plugs are a high quality replacement for many vehicles on the road today. They are our latest in spark plug technology and an exact replacement for your vehicle’s original components. Iridium composition provides a high melting point and great strength, and provides excellent wear resistance and durability. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function.

Review: Great product - Great price Came fast Works great in 2015 Cruze
Review: OEM plugs. Get a torque wrench. - OEM plugs for my 2015 Chevrolet Trax. Came pre-gapped. I verified the gap and they were all correct. Took minutes to install. My vehicle runs much smoother nwo! Word of the wise: use a torque wrench to make sure you don’t over tighten the plugs. You’ll regret it otherwise.

## Features

- Iridium offers excellent engine idle stability and smooth performance
- Iridium allows for small, efficient electrode designs for reliable cold starting and quick acceleration
- Iridium fine-wire electrode helps burn away carbon deposits on the tip of the plug as they form
- One piece suppressor seal helps block radio frequencies that can affect vehicle electronics
- Suppressor seal meters spark energy for long electrode life and helps prevent combustion leakage

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00DU252BM |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #549,690 in Automotive ( See Top 100 in Automotive ) #2,892 in Automotive Replacement Spark Plugs |
| Brand | ACDelco |
| Brand Name | ACDelco |
| Compatible with Vehicle Type | Motorcycle |
| Core Material | Iridium |
| Customer Reviews | 4.8 out of 5 stars 803 Reviews |
| Global Trade Identification Number | 40707773972098 |
| Included Components | Spark Plug |
| Item Type Name | Spark Plug |
| Item Weight | 1.44 ounces |
| Manufacturer | ACDelco |
| Manufacturer Part Number | 55585517 |
| Manufacturer Warranty Description | 7 Year / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details. |
| Model Number | 41-121 |
| Number of Items | 1 |
| Number of Packs | 1 |
| OEM Equivalent Part Number | 55585517 |
| Part Interchange Info | 41-121 |
| Thread Size | 14mm |
| Top Material Type | Nickel |
| UPC | 707773972090 |
| Unit Count | 1 Count |
| Vehicle Service Type | Motorcycle |

## Product Details

- **Brand:** ACDelco
- **Core Material:** Iridium
- **Thread Size:** 14mm
- **Top Material Type:** Nickel
- **Vehicle Service Type:** Motorcycle

## Images

![ACDelco Professional 41-121 (55585517) Iridium Spark Plug (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/61Z3E8ykbwL.jpg)
![ACDelco Professional 41-121 (55585517) Iridium Spark Plug (Pack of 1) - Image 2](https://m.media-amazon.com/images/I/818P2Bdzy9L.jpg)
![ACDelco Professional 41-121 (55585517) Iridium Spark Plug (Pack of 1) - Image 3](https://m.media-amazon.com/images/I/51GsZPs3vtL.jpg)
![ACDelco Professional 41-121 (55585517) Iridium Spark Plug (Pack of 1) - Image 4](https://m.media-amazon.com/images/I/61xROU51oHL.jpg)
![ACDelco Professional 41-121 (55585517) Iridium Spark Plug (Pack of 1) - Image 5](https://m.media-amazon.com/images/I/71dSTHf6S5L.jpg)

## Questions & Answers

**Q: Is there a recommended interval for changing my vehicle’s spark plugs?**
A: Yes, the interval depends on each vehicle model’s specifications. Refer to your vehicle Owner’s Manual for guidance on when you should change your vehicle’s spark plugs.

**Q: Should I change all of my vehicle’s spark plugs at the same time?**
A: Yes, when it is time for a scheduled spark plug replacement, all spark plugs should be changed. If a single spark plug is fouled or damaged outside of scheduled maintenance, finding the source of the damage and changing it is recommended.

**Q: Can I just clean my spark plugs instead of replacing them?**
A: No, ACDelco does not recommend cleaning old spark plugs. Cleaning spark plugs does not repair broken components, chipped insulator tips, and worn electrodes and wires.

**Q: What is pre-ignition and can it damage my engine?**
A: Yes, pre-ignition can cause serious damage to an engine. Pre-ignition, often accompanied by engine knocking sounds, air and fuel ignite in the engine before the spark plug fires. The condition commonly occurs when old spark plugs are worn or dirty.

**Q: Does a diesel engine require a different type of plug than a gas engine?**
A: Yes, diesel engines require glow plugs instead of spark plugs. To learn what type of glow plugs or spark plugs your vehicle requires, refer to your vehicle Owner’s Manual for guidance.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product
*by A***N on September 5, 2025*

Great price Came fast Works great in 2015 Cruze

### ⭐⭐⭐⭐⭐ OEM plugs. Get a torque wrench.
*by M***D on September 28, 2025*

OEM plugs for my 2015 Chevrolet Trax. Came pre-gapped. I verified the gap and they were all correct. Took minutes to install. My vehicle runs much smoother nwo! Word of the wise: use a torque wrench to make sure you don’t over tighten the plugs. You’ll regret it otherwise.

### ⭐⭐⭐⭐⭐ Genuine OEM spark plugs
*by B***E on July 12, 2024*

Cant go wrong installing OEM ac delco spark plugs. The original plugs lasted 80,000 miles. And I imagine these plugs will do the same.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.is/products/20323951-acdelco-professional-41-121-55585517-iridium-spark-plug-pack-1](https://www.desertcart.is/products/20323951-acdelco-professional-41-121-55585517-iridium-spark-plug-pack-1)

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-08-23*