CHAMPION
More Information for CHAMPION 309
{Alternate Inventory Numbers: RG4HC}
Continue Shopping
 
CHAMPION 309  
Out of Stock
Price
Core
Pack
Total
CHAMPION 309close
Part image
CHAMPION 309 Specifications
Insulator Height0.03 In.
Thread Diameter0.394 In.
Hex Size0.625 In.
Reach0.75 in.
Ground Electrode Quantity1
Thread Diameter10.000 MM
Hex Size16.000 MM
Manufacturer Heat Range4
ClassificationChampion Copper Plus
Center Electrode Tip MaterialNickel Copper Alloy
Ground Electrode Core MaterialNickel Copper Alloy
Electrical Terminal TypeNon-Removable Nut
Plug TypeRG4HC
Resistor TypeYes
Copper Plus
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
★★★ ★★★★★ ★★
OEM / Interchange Numbers: 4303

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