More Information for DENSO 5378

{Alternate Inventory Numbers: IWF20}

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DENSO 5378

$5.70

Price

$0.00

Core

+ Sold in packs of 1x1

Pack

$5.70

Total

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DENSO 5378 Specifications
Center Electrode Core Material	Copper
Center Electrode Tip Material	Iridium
Ground Configuration	Standard
Ground Electrode Core Material	Nickel
Ground Electrode Quantity	1
Ground Electrode Tip Design	Tapercut, U-Groove
Hex Size	20.6 mm
Manufacturer Heat Range	20
Pre-Gap Size	0.8 mm
Reach	12.7 mm
Resistance	5000.0 oh
Seat Type	Flat
Thread Diameter	14.0 mm

Iridium Power; Pre-Set Gap: 0.032"

Features & Benefits:

LIFESPAN / DURABILITY | Iridium alloy is 6X harder and 8X stronger than Platinum

Iridium with Rhodium Center Electrode -- has the highest concentration of Iridium of any spark plug and outperforms in the most severe engine temperatures, resisting oxidation and voltage wear for over 100,000 miles.
Patented 360-Degree Laser Welding -- creates the highest quality bond for structural support of the center electrode.

0.4 mm Fine Wire Iridium Center Electrode -- achieves higher ignitability and requires lower spark voltage to enable high-response driving with fewer misfires. As a result, acceleration improves in comparison with normal plugs.
Tapered Cut Ground Electrode -- improves firing performance by reducing quenching.

Patented U-Groove ② Ground Electrode -- enables complete combustion by allowing the spark to fill the gap created by the U shape. The ball of fire created in the U-Groove develops a larger and hotter flash front that virtually eliminates excessive fouling and erratic starts caused by poor fuel mixtures.

Which DENSO Spark Plug Is Right For You?

Material / Series	Lifespan / Durability	Performance / Ignitability	Efficiency / Fuel Economy
Copper / Nickel U-Groove	★	★	★
Platinum Twin Tip	★★★★	★★	★★
Double Platinum	★★★★★	★★	★★
Iridium Twin Tip	★★★★★★	★★★★	★★★
Iridium Power	★★★★	★★★★★	★★★
Iridium Long Life	★★★★★★	★★★★	★★

Videos

How To Replace DENSO Spark Plugs

Additional Resources

Warranty Information:
No Warranty