CHAMPION
More Information for CHAMPION 518
{Alternate Inventory Numbers: W18}
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CHAMPION 518  
$6.09
Price
$0.00
Core
+ Sold in packs of 1x1
Pack
$6.09
Total
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CHAMPION 518 Specifications
Center Electrode Diameter (IN)0.125
Center Electrode Tip MaterialNickel
Ground Electrode Core MaterialNickel
Ground Electrode MaterialNickel Copper Alloy
Ground Electrode Quantity1
Hex Size (IN)0.938
Hex Size (MM)23.830
Hex TypeHex
IndexedNo
Installed Height (in)2.57
Manufacturer Heat Range18
Plug TypeW18
Pre-Gap Size (IN)0.025
Pre-Gap Size (MM)0.64
Reach (IN)0.75
Resistor TypeNo
Seat TypeFlat
Taper Diameter (IN)0.42
Thread Diameter (IN)0.875
Thread Diameter (MM)22.225
Washer IncludedYes
Washer TypeCrush
Copper Plus; Pre-Set Gap: 0.025"
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: 3076, AC600R

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