More Information for CHAMPION 516
{Alternate Inventory Numbers: D16}
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CHAMPION 516 Specifications
Center Electrode Diameter (IN)0.125
Center Electrode Tip MaterialNickel
Electrical Terminal TypeRemovable Nut
Ground Electrode Core MaterialNickel
Ground Electrode MaterialNickel Copper Alloy
Ground Electrode Quantity1
Hex Size (IN)0.875
Hex Size (MM)22.230
Hex TypeHex
Installed Height (in)2.34
Manufacturer Heat Range16
Plug TypeD16
Pre-Gap Size (IN)0.025
Pre-Gap Size (MM)0.64
Reach (IN)0.5
Resistor TypeNo
Seat TypeFlat
Taper Diameter (IN)0.4
Thread Diameter (IN)0.709
Thread Diameter (MM)18.000
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
Platinum Power
★★ ★★★★
Double Platinum
Double Platinum
★★★★ ★★★★
★★★ ★★★★★ ★★
OEM / Interchange Numbers: 2775, 2A3643, 376, 386, AA4369R, TG44840

Closeout Inventory Warranty Information:
Wholesaler Closeout items have a 30 day warranty (but still are covered by our Return Policy).

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