CHAMPION
More Information for CHAMPION 401
{Alternate Inventory Numbers: RS12YC}
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CHAMPION 401  
$1.73
Price
$0.00
Core
$1.73
Total
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CHAMPION 401 Specifications
Center Electrode Diameter (IN)0.078
Center Electrode Tip MaterialNickel
Electrical Terminal TypeRemovable Nut
Ground Electrode Core MaterialNickel
Ground Electrode MaterialNickel Copper Alloy
Ground Electrode Quantity1
Hex Size (IN)0.625
Hex Size (MM)15.880
Hex TypeHex
IndexedNo
Installed Height (in)2.05
Insulator Height (in)0.06
Insulator Projection (IN)0.06
Manufacturer Heat Range12
Plug TypeRS12YC
Pre-Gap Size (IN)0.040
Pre-Gap Size (MM)1.02
Reach (IN)0.689
Resistor TypeYes
Seat TypeTapered
Taper Diameter (IN)0.25
Thread Diameter (IN)0.551
Thread Diameter (MM)14.000
Washer IncludedNo
Copper Plus; Pre-Set Gap: 0.04"
Champion Copper Plus spark plugs have been original equipment on a wide variety of engines for many years. These plugs have nickel alloy centers and ground electrodes, with reasonably good wear characteristics. In addition, the extrusion of copper into the center electrode allows for increased conductivity and heat control.

Features & Benefits:
  • Dependable and durable
  • Built to ISO and SAE standards for proven performance
  • Patented SAC-9 semi-conductor resistor for maximum EMI & RFI suppression
  • Copper core center electrode allows for accurate control of heat range for longer life
  • TinTac® and ULTRASEAL shell for best corrosion protection of any spark plug in the industry
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
★★★ ★★★★★ ★★
Additional Resources

Technical Bulletin for 5.4L 2004-2005 Ford F-150, Expedition, Super Duty & Lincoln Navigator
OEM / Interchange Numbers: 104, 105, 5243, 5F1E12405AA, 605, 764, 765, 865, AP104

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