# NGK IX Iridium Spark Plug Box of 4 (LKR7AIX)

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

-   RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
-   Trivalent metal plating for superior anti-corrosion and anti-seizing properties
-   Outstanding acceleration, high fuel efficiency and durability
-   Fine iridium tip ensures durable and consistent spark

This Part Fits:

Year

Make

Model

Submodel

2007-2008

Dodge

Sprinter 2500

Base

2007-2008

Dodge

Sprinter 3500

Base

2007-2008

Freightliner

Sprinter 2500

Base

2007-2008

Freightliner

Sprinter 3500

Base

2010-2011

Kia

Soul

Base

2006-2007

Mercedes-Benz

C230

Sport

2012-2014

Mercedes-Benz

C250

Base

2012-2014

Mercedes-Benz

C250

Luxury

2012-2014

Mercedes-Benz

C250

Sport

2006-2007

Mercedes-Benz

C280

4Matic

2006-2007

Mercedes-Benz

C280

Luxury

2008-2012

Mercedes-Benz

C300

4Matic Luxury

2008-2012

Mercedes-Benz

C300

4Matic Sport

2008-2011

Mercedes-Benz

C300

Luxury

2008-2011

Mercedes-Benz

C300

Sport

2006-2007

Mercedes-Benz

C350

4Matic

2006-2007

Mercedes-Benz

C350

Luxury

2006-2011

Mercedes-Benz

C350

Sport

2009-2010

Mercedes-Benz

CL550

4Matic

2007-2008

Mercedes-Benz

CL550

Base

2006-2009

Mercedes-Benz

CLK350

Base

2007-2009

Mercedes-Benz

CLK550

Base

2007-2011

Mercedes-Benz

CLS550

Base

2006-2011

Mercedes-Benz

E350

4Matic

2006-2011

Mercedes-Benz

E350

Base

2007-2011

Mercedes-Benz

E550

4Matic

2007-2011

Mercedes-Benz

E550

Base

2009-2015

Mercedes-Benz

G550

Base

2008-2012

Mercedes-Benz

GL550

Base

2010-2012

Mercedes-Benz

GLK350

4Matic

2010-2012

Mercedes-Benz

GLK350

Base

2006-2011

Mercedes-Benz

ML350

4Matic

2009-2011

Mercedes-Benz

ML350

Base

2010-2011

Mercedes-Benz

ML450

Hybrid 4Matic

2008-2011

Mercedes-Benz

ML550

Base

2006-2011

Mercedes-Benz

R350

4Matic

2008-2009

Mercedes-Benz

R350

Base

2006

Mercedes-Benz

S350

Base

2010-2013

Mercedes-Benz

S400

Hybrid

2007-2011

Mercedes-Benz

S550

4Matic

2007-2011

Mercedes-Benz

S550

Base

2007-2009,2011-2012

Mercedes-Benz

SL550

Base

2012-2015

Mercedes-Benz

SLK250

Base

2006-2008

Mercedes-Benz

SLK280

Base

2009-2011

Mercedes-Benz

SLK300

Base

2005-2011

Mercedes-Benz

SLK350

Base

2007

Mitsubishi

Outlander

ES

2010-2013

Mitsubishi

Outlander

GT

2007-2008

Mitsubishi

Outlander

LS

2007-2011

Mitsubishi

Outlander

XLS

2009-2010

Smart

Fortwo

Brabus

2008-2015

Smart

Fortwo

Passion

2008-2015

Smart

Fortwo

Passion Cabrio

2008-2015

Smart

Fortwo

Pure

## Details

- **Price:** 74.61 CAD
- **Vendor:** NGK
- **Type:** Spark Plugs

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 74.61 CAD | In stock |

## Images

- Photo - Primary
- Photo - Primary
- Photo - out of package
- Photo - out of package

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/ngk-ix-iridium-spark-plug-box-of-4-lkr7aix)
> Updated: 2026-06-27