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Home / Engine / Spark Plugs / NGK Racing Spark Plug Box of 4 (UR4IX)
NGK Racing Spark Plug Box of 4 (UR4IX)Representative image
Appearance and included parts may differ. Image availability does not confirm fitment or availability.
NGK

NGK Racing Spark Plug Box of 4 (UR4IX)

PART 7401CATEGORY Spark Plugs
$90.60
$90.60
1

Product information

Manufacturer information. Check the part number and installation requirements for your vehicle.

Supplier details checked 2026-09-23 · Test catalog

Product description

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability.

NGK Iridium IX Spark Plug

Features

RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs

Pure alumina silicate ceramic insulator provides superior strength and better heat transfer

Special insulator nose configurations improve throttle response

Corrugated ribs prevent flashover

Copper core aids in heat removal

Triple seals prevent leakage

Manufacturer application notes

CHECKER 1978-70; CHEV 1993-70; CHR/DOD/PLY 1987-74; FORD/LIN/MERC 1996-69; GM 1993-67; JEEP 1971-69, I/O - 2000-99 KODIAK, 1998-78 OMC, PE ENGINES - HON, KOHLER, MITS, SUBARU-ROBIN, OPE - VARIOUS

Supplier category
Ignition
Supplier subcategory
Spark Plugs
UPC / barcode
87295174012
Alternate part number
UR4IX
Units per product
4
Supplier Proposition 65 status
Unknown
Supplier EPA status
N/A
Air freight prohibited
No
Not CARB approved
No
CARB acknowledgement required
No
Freight delivery required
No
Powersports product
No
More manufacturer information

Other product descriptions

NGK Racing Spark Plug Box of 4 (UR4IX)

Iridium IX Spark Plug

About the manufacturer

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

NGK Racing Series plugs are engineered to withstand the harshest engine conditions.

Additional manufacturer information

Spark Plug

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