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NGK 6441 ZFR6FIX 11 Iridium Spark Review

3

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Excellent

Revainrating 5 out of 5  
Rating 
5.0
🧯 Ignition Parts, 🛠️ Replacement Parts

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Details

BrandNGK
Core MaterialIridium
Top Material TypeMetal

Description of NGK 6441 ZFR6FIX 11 Iridium Spark

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior fouling. The 0.6 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect. Longer insulator nose avoid fouling, the corrugated ribs on insulator avoid flashover, and a triple gasket seal eliminates combustion gas leakage. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines. Trivalent Metal Plating provides superior corrosion and seizing properties; Part number of spark plug inside the box: ZFR6FIX-11.

Reviews

Global ratings 3
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  • 3
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  • 2
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  • 1
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Type of review

Revainrating 5 out of 5

Amazing Spark Plugs for Automotive Enthusiasts

My analysis of this ignition part showed that it is hands down the best on the market! The performance and consistency of these spark plugs are second to none. I have noticed a significant improvement in both the fuel economy of my car and the overall performance since installing them. The iridium material ensures longer durability, and the installation process was straightforward. The only con is that they are slightly expensive, but the performance benefits make up for the cost.

Pros
  • Improved performance and fuel economy, durable iridium material
Cons
  • Slightly expensive

Revainrating 5 out of 5

You get what you pay for.

Good long lasting spark plugs. I replaced a set of these with 158,000 miles on my 2001 Honda Civic, the car still ran fine, they were just worn out. NGK is very familiar with Japanese cars. Highly recommended.

Pros
  • Longer insulator nose prevents clogging, corrugated insulator ribs prevent burnout and triple sealing prevents leakage of combustion products
Cons
  • 0

Revainrating 5 out of 5

Great replacement! on spark plugs

I swapped my stock spark plugs for these in my Jeep Liberty. Chrysler requires a V-Power version due to the copper core, but they have a copper core and a stronger iridium tip. Smoothed out my 3.7 engine well and they should last a lot longer than stock spark plugs. I only wish there was a 6 pack option!

Pros
  • Trivalent metal coating provides excellent anti-corrosion and anti-seize properties; Spark plug part number in the box: ZFR6FIX-11
Cons
  • Long wait