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25% Off All Online Orders of Select Parts and Accessories
Receive 25% Off Your Online Purchase. Use promotional code 25PEP at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 12/12/16. Online orders scheduled for in-store pick up must be completed by closing on 12/11/16 for discount to apply.

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  • Part #: 6637|
  • SKU: 9216642

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    • Fine tipped Iridium center electrode ensures high durability and a consistently stable spark
    • Iridium alloy has an extremely high melting point, perfect for today's high-performance engines
Retail
$7.79
PayPal available for online purchases. Major credit cards accepted online and in store. Pay online, in-store or take advantage of our Pep Boys credit card. Learn more and see additional details in cart.

NGK Iridium IX Spark Plug

NGK Iridium IX spark plugs provide the best ignitablity in a single precious metal spark plug. Iridium IX plugs are best suited for high performance and modified engines which may require a colder heat range. Refer to NGK catalog for more information on selecting the correct Iridium IX spark plug
  • Fine tipped Iridium center electrode ensures high durability and a consistently stable spark
  • Iridium alloy has an extremely high melting point, perfect for today's high-performance engines
  • Trivalent metal plating has superior anti-corrosion and anti-seizing properties
  • Taper-cut ground electrode is designed to open up more area for flame expansion reducing the quenching effect
When you require the best, count on The World Leader in spark plug technology NGK Spark Plugs. We offer the highest quality products for virtually every vehicle application. Count on NGK Spark Plugs to deliver the finest quality products and customer service.

Hex Size
13/16"
Terminal Type
loose
Seat Type
gasket
Heat Range
6
Thread Size
14mm
Thread Reach
3/4"

9216642

Rated 4.7 out of 5 by 13 reviewers.
Rated 5 out of 5 by Love my lift supports Easy to install March 2, 2014
Rated 4 out of 5 by GOOD PLUGS These NGK spark plugs are factory recommended for my Hyundai Accent. I haven't noticed any difference in mileage (in fact, mileage has slightly decreased, but that's probably because computer hasn't adjusted to the new spark plugs yet). I took the old NGK Iridium plugs out of my car at 68,000 miles and they still looked pretty good. Car peppier and smoother with new spark plugs of course. With such an expensive part like an engine, I stick to factory-recommended plugs. February 17, 2014
Rated 4 out of 5 by FACTORY SPARK PLUGS These are factory NGK spark plugs for my 2009 Hyundai Elantra. Engines are expensive, so I like to stick with factory whenever I can. The model is slightly different than factory, and mileage went slightly down (almost not noticeable), but the engine is much smoother and peppier now. Good for another 50,000 or 60,000 miles now. February 12, 2014
Rated 5 out of 5 by excelent and powerful spark plugs A excelent product and great price December 26, 2013
Rated 5 out of 5 by Plugs were fine and arrived fast Rec'd set of sparkplugs in 2 days from order. Car is happy. October 21, 2013
  • 2016-12-10 T09:56:20.649-06:00
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