NGK® - Iridium IX™ Spark Plug

4 reviews|Item # sp5201|Similar Products
$6.47 - $8.48
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Iridium IX™ Spark Plug by NGK®. NGK manufactures all types of spark plugs and glow plugs featuring the latest in technology. Designed for performance enthusiasts who want extreme ignitability, improved throttle response and superior anti-fouling, these spark plugs are a great option for modified engines and appropriate replacement for OE spark plugs, where recommended. With a 0.6 mm laser welded iridium tip and taper cut ground electrode, these plugs provide more area for flame expansion for quicker starts, improved performance, and better efficiency.


  • Fine Iridium tip ensures high durability and a consistently stable spark
  • Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines
  • Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties
  • Outstanding acceleration, high fuel efficiency and durability
  • Ultimate design, technology and performance

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 produced more than 11 billion spark plugs and glow plugs. Autolite 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, ignition wire sets and Coil-on-Plug boots, the Autolite brand has the right ignition products for your vehicle, regardless of make or model, import or domestic.

Starting with a single product in 1936, NGK® became the world leader in innovation, technology, and premium quality in the manufacture of spark plugs for virtually every automotive manufacturer in the world. NGK`s extraordinary growth can be attributed to a philosophy of manufacturing the product where it is going to be used, which means a substantial number of products sold in the USA are made in America. One of the benefits of such a policy is the ability to work closely with manufacturers in developing products tailored specifically to their needs. Today with ISO 14001 and ISO/TS 16949 certification as well as state-of-the-art manufacturing and inventory facilities, NGK provides customers with the finest spark plugs and complimentary products.


NGK® - Spark Plugs Installation VideoNGK® - Spark Plugs Installation Video


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NGK® - Iridium IX™ Spark Plug
1-4 of 4 Reviews
5 of 5
NGK Plugs
Just what I expected, quality product and good pricing too.
Posted by Bill (Fort Myers, FL) / February 14, 20192000 Toyota Avalon
5 of 5
Best Product
It really makes a difference compared to the old ones and economic.
Posted by Felix (San Jose, CA) / October 19, 20162007 Scion tC
5 of 5
Perfect Spark Plugs
One of the best iridium spark plugs. Work flawlessly. The quality is high, the tapered thread seals the plug when you tighten it.
Posted by Jeramie (Lawtey, FL) / September 14, 20162010 Ford F-250
5 of 5
Perfect Replacement!
I used this part to replace an old plug in my '82 Buick Skylark. The couple misfires I had went away, and all is well! Perfect replacement, and I couldn't be happier.
Posted by Brooks (Warrensburg, MO) / April 14, 20141982 Buick Skylark
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