NGK Iridium IX Spark Plugs - Set of 4

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

NGK Iridium IX Spark Plugs - Set of 4

67 reviews
Model
Regular price $29.99
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  • In stock, ready to ship
  • Inventory on the way

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 LSJ or .028" gap 1.4 LUJ/LUV

Iridium plugs have a very delicate tip, make sure you use a proper gapping tool (one that doesn't apply pressure to the tip) to change the gap or you could break off the tip. 

Customer Reviews
4.9 Based on 67 Reviews
5 ★
93% 
62
4 ★
4% 
3
3 ★
3% 
2
2 ★
0% 
0
1 ★
0% 
0
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SE
07/16/2022
SALEH E.
United States

GREAT

PERFECT PERFORMANCE ALONG WITH ZZP HIGH VOLTAGE COIL

LR
07/15/2022
Leo R.
United States United States

I ordered the spark plugs and got them in the next day or two, really fast shipping and customer service. Will be spending lots of more $$ on my 06 cobalt ss with you guys!

JW
06/22/2022
Justin W.
United States United States

Easy install and awesome for those originally equipped with ngk plugs

Awesome product. Engine shows signs of running smoother. Good product for those originally equipped with ngk plugs

WD
05/25/2022
William D.
United States United States

Great product! Got rid of awful motor vibration

Couldn't be more happy with my purchase! Will definitely buy again but these will most likely live out my engine

CS
04/06/2022
Christopher S.
United States United States

Hey

Like them they are good plugs

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