NGK Iridium IX spark plugs are a high quality performance spark plug featuring an iridium tip for very consistent and stable spark. Iridium also has a very high melting point which keeps it functional in a high heat, high performance engine. The Iridium IX spark plug also features special plating to resist corrosion and seizing.
Commonly used in the Mazdaspeed 3, Mazdaspeed 6, Mazda CX-7 and other engines. This is a one step colder plug (higher heat range) when using on the MZR DISI engine.
- Year:
- 2006/2007/2008/2009/2010/2011/2012/2013/2014/2015/2016/2017/2018
- Make:
- Ford/Mazda
- Model:
- Focus/3/6
- Submodel:
- ST/Mazdaspeed 3/Mazdaspeed 6
26 Reviews
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Best spark plugs! Highly recommend for the focus ST
AMAZING CUSTOMER SERVICE! Edge auto sport over anyone else!
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NGK 6510
Great shipping. Plugs seem to be working well. 10/10 would recommend. Toss in a sticker next order!
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Awesome
Great product and price and even better service
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BEST LASTING
I have been running these spark plugs since i have owned the car, edge auto always comes with fast shipping and great customer service!
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more power and longer life!
more power and longer life than stock!
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Great product and fast shipping!
I’ve been using these in my mazdaspeed3 for the past year or so and I will say these are great!
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MS3
First time ordering this brand. Impressed and timely shipping.
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Excellent
Used these as replacements for OEM on my 2008 Speed3 and they work great. Appear to be excellent quality and the car runs very well.
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The best
These are the best plugs for the mazdaspeed 3 period.
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Spark Plugs for MS3
My spark plugs arrived quickly and exactly as expected. Gapping and installing them went smoothly as well. I don't have anymore blowout since putting them in.
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colder plugs for focus ST
Fast shipping, great price, great service. Thanks JP and folks at Edge.
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Great Spark Plugs
Never had an issue with these spark plugs. They work great
