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

63 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 63 Reviews
5 ★
92% 
58
4 ★
5% 
3
3 ★
3% 
2
2 ★
0% 
0
1 ★
0% 
0
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CS
04/06/2022
Christopher S.
United States United States

Hey

Like them they are good plugs

B
03/25/2022
BDP
United States United States

Great so far

Haven't received any of my orders yet but so far customer service has been awesome. Questions answered quickly, easy to navigate site. Hopefully my parts get here fast so I can enjoy them.

MH
03/14/2022
MARK H.
United States United States

Niridium IX spark plugs & high voltage coil pack

2012 Sonic 1.4L turbo, 6 speed. Replaced OEM plugs and coil pack with NGK Iridium XI plugs and ZZP hv coil pack. Big difference. Quicker and smoother acceleration. I'm a very happyy camper. Great products, fast shipping. Thanks, ZZP.

SP
01/17/2022
Steven P.
United States United States

Great product, Great Price!

You will notice a difference in KR using the 1 step cooler plugs! Less heat= reduced chance of pre-ignition/Knock! add E85 and you are set with high boost applications!

RG
01/12/2022
Ricardo G.
United States United States

Spark plugs

Bought coil pack and spark plugs car runs much smoother

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