---
product_id: 12508559
title: "NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair)"
brand: "ngk"
price: "206 Lei"
currency: RON
in_stock: true
reviews_count: 13
url: https://www.desertcart.ro/products/12508559-ngk-iridium-ix-dcpr7eix-spark-plugs-compatible-with-1999-2016
store_origin: RO
region: Romania
---

# Up to +3HP boost Pre-gapped for perfect fit Enhanced anti-corrosion plating NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair)

**Brand:** ngk
**Price:** 206 Lei
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your ride with NGK Iridium IX — where power meets precision.

## Quick Answers

- **What is this?** NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair) by ngk
- **How much does it cost?** 206 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/12508559-ngk-iridium-ix-dcpr7eix-spark-plugs-compatible-with-1999-2016)

## Best For

- ngk enthusiasts

## Why This Product

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

## Key Features

- • **Iridium Edge Tech:** 25% smaller electrode means stronger, more consistent sparks and longer ignition life.
- • **Power Surge Ready:** Unlock up to 3 extra horsepower instantly for your Harley Twin Cam.
- • **Precision Pre-Gapped:** Installed straight out of the box—no hassle, just flawless ignition.
- • **Tailored for Twin Cam:** Specifically engineered for 1999-2016 Harley Davidson Twin Cam models—perfect fit, every time.
- • **Corrosion-Resistant Armor:** New metal shell plating guards against rust and wear for enduring performance.

## Overview

NGK Iridium IX DCPR7EIX spark plugs deliver a high-performance upgrade for 1999-2016 Harley Davidson Twin Cam motorcycles. Featuring a 25% smaller iridium electrode, these plugs reduce voltage requirements and extend ignition system life. Pre-gapped for easy installation, they also boast enhanced anti-corrosion metal shell plating, ensuring durability and reliable power gains of up to 3 horsepower.

## Description

DescriptionGain up to 3HP just by using these plugs! The ultimate in spark plug technology and performance from the industry leader The iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4 the size of a conventional nickel electrode Ultra-small diameter center electrode reduces voltage requirement and extends ignition system life New metal shell plating has enhanced anticorrosion qualities Come pre-gapped

Review: Smooth Idle and Stronger Spark – Worth Every Penny - Installed these NGK Iridium IX DCPR7EIX spark plugs in my 1999–2016 Harley Davidson Twin Cam, and the difference was noticeable right away. The bike fired up quicker, idled smoother, and throttle response felt more crisp. NGK quality speaks for itself. The iridium tip is known for durability and a strong, consistent spark, and that’s exactly what you get. They feel like a premium upgrade over standard plugs, especially if you ride often or want dependable performance. Fitment was perfect, no issues with installation, and they came properly packaged as a matched pair. For the price, it’s a solid upgrade that improves reliability and performance without breaking the bank. If you’re running a Twin Cam and want better ignition performance and long service life, these are an easy 5-star choice.
Review: Excellent Spark Plugs! - I bought these spark plugs for my 2007 Harley-Davidson Softail Night Train (FXSTB). They fit perfectly! The price is for a pair (2 plugs) — very convenient and affordable. After installation, the motorcycle started instantly and runs smoothly and quietly. I’m very happy with this purchase and highly recommend these plugs to all Harley owners — great quality for a fair price!

## Features

- Come pre-gapped
- The ultimate in spark plug technology and performance from the industry leader
- Ultra-small diameter center electrode reduces voltage requirement and extends ignition system life
- New metal shell plating has enhanced anti corrosion qualities

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003BUCNNS |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #10,959 in Automotive ( See Top 100 in Automotive ) #41 in Automotive Replacement Spark Plugs |
| Brand | NGK |
| Core Material | Nickel |
| Customer Reviews | 4.7 4.7 out of 5 stars (4,785) |
| Date First Available | December 12, 2013 |
| Exterior | Painted |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.44 ounces |
| Item model number | DCPR7EIX |
| Manufacturer | NGK |
| Manufacturer Part Number | DCPR7EIX |
| Model | NGK DCPR7EIX |
| Position | Front |
| Product Dimensions | 3.31 x 0.94 x 0.83 inches |
| Thread Size | 12mm |
| Top Material Type | Metal |
| UPC | 700155016542 |
| Vehicle Service Type | Motorcycle |

## Product Details

- **Brand:** NGK
- **Core Material:** Nickel
- **Thread Size:** 12mm
- **Top Material Type:** Metal
- **Vehicle Service Type:** Motorcycle

## Images

![NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair) - Image 1](https://m.media-amazon.com/images/I/61RTkqyQPKL.jpg)

## Questions & Answers

**Q: Should I gap  to my owners manual spec or are they designed to work with the smaller pre-gap they came with?**
A: Harley Davidson recommends 0.40" gap.  As to "You should never gap an iridium plug", NGK's website states for Harley Davidson, these should be gapped at 0.40".  I've found many websites stating that if re-gap is needed use care not to damage the electrode or the porcelain center.  So, it's not that you should not re-gap, it's that you should be extremely careful.

**Q: Are these 14mm threads?**
A: Yes

**Q: Do you get 1 or 2 spark plugs in this price**
A: Pair / 2 plugs

**Q: Is this 6r12, if so why does it not say so ?**
A: Because these plugs are IX DCPR7EIX 99 TO 16 HARLEY-DAVIDSON

## Customer Reviews

### ⭐⭐⭐⭐⭐ Smooth Idle and Stronger Spark – Worth Every Penny
*by E***N on February 10, 2026*

Installed these NGK Iridium IX DCPR7EIX spark plugs in my 1999–2016 Harley Davidson Twin Cam, and the difference was noticeable right away. The bike fired up quicker, idled smoother, and throttle response felt more crisp. NGK quality speaks for itself. The iridium tip is known for durability and a strong, consistent spark, and that’s exactly what you get. They feel like a premium upgrade over standard plugs, especially if you ride often or want dependable performance. Fitment was perfect, no issues with installation, and they came properly packaged as a matched pair. For the price, it’s a solid upgrade that improves reliability and performance without breaking the bank. If you’re running a Twin Cam and want better ignition performance and long service life, these are an easy 5-star choice.

### ⭐⭐⭐⭐⭐ Excellent Spark Plugs!
*by A***N on October 20, 2025*

I bought these spark plugs for my 2007 Harley-Davidson Softail Night Train (FXSTB). They fit perfectly! The price is for a pair (2 plugs) — very convenient and affordable. After installation, the motorcycle started instantly and runs smoothly and quietly. I’m very happy with this purchase and highly recommend these plugs to all Harley owners — great quality for a fair price!

### ⭐⭐⭐⭐⭐ Great plugs
*by W***S on June 5, 2025*

Perform well in my 2011 Harley FLHTK 103. No issues with fitment, look good, good value, bike start after install.

## Frequently Bought Together

- NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair)
- K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Harely Davidson, Buell Motorcycles, KN-171C
- K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Harely Davidson Motorcycles, KN-171B

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---

*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-28*