NGK Iridium IX Spark Plugs

$29.99 

34 reviews



This variant is currently out of stock

Ignition - NGK Iridium IX Spark Plugs
Ignition - NGK Iridium IX Spark Plugs

Sold as a set of 4. 

Iridium IX Spark plugs are the most technologically advanced high performance plugs available. Featuring a 0.6 mm iridium center electrode tip, they offer superior ignitability without sacrificing duality. The tapered ground electrode increases flame kernel expansion, while the superior heat range design is ideally suited to the demands of the high performance environments. Specially designed to meet the needs of serious enthusiasts, Iridium IX Spark Plugs offer outstanding acceleration, high fuel efficiency, and long life. When you demand the most from your engine, rely on the proven performance of NGK Iridium IX Spark Plugs. Iridium IX Spark Plugs are the most technologically advanced high performance plugs available.

Iridium plugs burn clean and a cooler range of plug can be used without the normally associated risk of plug fouling. This is why we recommend them over the Autolites for the boosted Ecotec. 

  • Choose stock heat range for cars with stock pulleys down to 3.2".
  • Choose one range colder for 3.0" pulley use. 
  • Choose two ranges colder for 2.8" and below pulley sizes. 
  • .033 gap. 

Iridium plugs should not be regapped. The tip is too delicate for the gap to be changed. They come set up for high boost applications.

Ignition - NGK Iridium IX Spark Plugs
Ignition - NGK Iridium IX Spark Plugs
Customer Reviews
4.9 Based on 34 Reviews
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  • 2015
BT
07/03/2020
Bruce T.
United States United States
NGK Plugs

Darn Good Plugs

ND
07/02/2020
Noah D.
United States United States
Overall car refresh

The shipping was fast being that I love in Michigan and the install took me 20 min. My Cruze feel smoother and more responsive since the upgrade. Would definitely recommend!

DM
07/02/2020
David M.
United States United States
2019 Sonic RS Hatchback

1000% times better than stock and you'll feel the difference especially in performance and mpg gains

CW
06/21/2020
Collin W.
United States United States
Pretty good

Great product. My 2015 chevy cruze can handle the stage 1 cooler plug. The idle has gotten much better from stock version. Would recommend.

NA
05/20/2020
Nicholas A.
United States United States
Awesome

Great spark plugs! Gapped them to .035 and no issues. Fast shipping and well packaged