CHAMPION
More Information for CHAMPION 7426
{Alternate Inventory Numbers: RERX4PMPB}
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CHAMPION 7426  
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CHAMPION 7426 Specifications
Center Electrode DesignFine Wire
Center Electrode Tip MaterialPlatinum
Electrical Terminal TypeNon-Removable Nut
Ground Electrode Core MaterialPlatinum
Ground Electrode Quantity1
Ground Electrode Tip MaterialPlatinum
Hex Size (IN)0.546
Hex Size (MM)14/Bi-hex
Hex TypeBi-Hex
IndexedNo
Insulator Height (in)0.118
Manufacturer Heat Range4
Plug TypeRERX4PMPB
Pre-Gap Size (IN)0.028
Pre-Gap Size (MM)0.7
Reach (IN)1.043
Resistor TypeYes
Seat TypeFlat
SkirtNo
Thread Diameter (IN)0.470
Thread Diameter (MM)12
Washer IncludedYes
Washer TypeCrush
Double Platinum Power; Pre-Set Gap: 0.028"
Champion Double-Platinum Power spark plugs have platinum on both the center and ground electrodes. The center electrode is platinum fine wire that is riveted onto the nickel alloy center electrode. The ground electrode has a platinum pad welded to its surface.

This plug design is widely used for a distributorless ignition with a Waste Spark design. In this kind of ignition system, one bank of spark plugs fires from the center electrode to the ground and the other bank fires from the ground electrode to the center.

Features & Benefits:
  • More power, quicker acceleration
  • Fine wire center electrode and V-trimmed ground electrode create a sharp spark focus
  • Maintains stable operating temperature under all engine loads
  • Heat-Active™ alloy allows electrodes to reach optimal temperature
  • Platinum conductors on both center and ground electrodes for longer life and minimal wear
This spark plug is pre-gapped, but may require minor adjustments with a Spark Plug Gap Tool / Feeler Gauge to match your engine's specifications. For proper engine performance, gaps should be within ±0.004" of OE-Recommended value.
Which CHAMPION Spark Plug Is Right For You?

Material / Series Lifespan / Durability Performance / Ignitability Efficiency / Fuel Economy
Copper / Nickel Plus
Copper
Platinum Power
Platinum
★★ ★★★★
Double Platinum
Double Platinum
★★★★ ★★★★
Iridium
Iridium
★★★ ★★★★★ ★★
OEM / Interchange Numbers: 12120034098, 12122163332, 12122293697

CHAMPION Warranty Information:
Iridium plugs 7 years - Double Platinum Power 5 years - Platinum Power 3 years - Copper Plus 2 years