Denso (5340) ITV22 Iridium Power Spark Plug 1 step colder - Pack of 4


by: Denso

  • $39.96
  • 4 reviews

Increased performance with World's smallest Iridium Center Electrode (0.4mm). To increase ignitability, the important point is to let the flame kernel produced by the spark to grow unobstructed. Normally, this can be accomplished by widening the spark gap. However, this causes spark voltage to increase, which has the opposite effect. Iridium Power uses DENSO's patented U-Groove ground electrode to achieve maximum ignitability while minimizing required voltage.

We recommend these 1 Step Colder Plugs for EcoBoost vehicles running modifications with a custom tune ( .028" Gap for Focus ST/Fiesta ST cars, and .026" Gap for all other cars listed below)

Ford Fiesta ST EcoBoost 1.6L 2014 2015 2016 2017 2018 2019
Ford Focus ST EcoBoost 2.0L 2013 2014 2015 2016 2017 2018
Ford Focus RS EcoBoost 2.3L  2016 2017 2018
Ford Fusion EcoBoost 2014 2015 2016 2017 2018
Ford Mustang EcoBoost 2.3L 2015 2016 2017 2018 2019 2020
Mazdaspeed 3 2007-up

Does NOT fit 1.5L EcoBoost vehicles

Be careful to install them with a proper spark plug socket that holds the plug. Tighten to 14 ft lb using a torque wrench.

Heat Range Guide:
ITV20 - Stock heat range
ITV22 - One step colder than stock (recommended for stock turbo vehicles with a tune)

Mfr Label Iridium Power
Fuel Type GAS
Resistance 5000
Ground Electrode Tip Design Tapercut, U-Groove
Ground Configuration Standard
Ground Electrode Core Material Nickel
Center Electrode Core Material Copper
Center Electrode Tip Material Iridium Rhodium Alloy
Gap Size 0.032 In
Ground Electrode Quantity 1
Hex Size 16.0
Manufacturer Heat Range 22
Seat Type Tapered
Reach 25.00 mm
Thread Diameter 0.551 mm

Customer Reviews
5.0 Based on 4 Reviews
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FSWERKS Denso (5340) ITV22 Iridium Power Spark Plug 1 step colder - Pack of 4 Review
Amazing Plugs

Install is what you expect for a spark plug, but i switched to the Denso's per Raffi's suggestion and boy was there a difference between these and the ngk's i was running. My car runs smoother and feels more snappy now. Definitely reccomend the denso for your Focus ST!

corey t.
United States United States
Great buy

Switched from the NGK’s to the Denso and I could tell the car runs better. It was also a plus that they came pre-gapped at .28 I would highly recommend

Daniel B.
United States United States

not sure if lucky but they came pre gapped. made install a breeze.

zach m.
United States United States
Good rpm , best acceleration , do it

Aiuta parecchio, miglior combustione e miglior ripresa

Luca N.