Champion Spark Plug RN16YC5  #105 Replaces: BP4ES13 BPR4ES13 BP5EA13 BPR4EY GR45 GR55 2642 2822 4268 5564
 
Champion copper cored center electrode with triple coated shells, this eliminates the need for the use of anti-seize compound during installation by providing the best corrosion protection of any spark plug in the industry. 
 
The Champion Copper Plus core with Zirconia enhanced insulator spark plug features a copper core electrode that provides increased conductivity and heat control while delivering good overall wear characteristics. 
 
Copper core center electrode allows for accurate control of the plug's heat range, optimizing the plug's performance and adding to the longevity of the spark plug. 
  • The spark plug is designed to withstand high operating temperatures.
  • Plug: #105
  • Model: RN16YC5
  • Thread size: 14 mm
  • Reach: 0.750" (19 mm)
  • Resister: Yes
  • Wrench size: 13/16"
  • Spark plug seat: Gasket
  •  
  • MPN: 105
  • UPC: 037551000456

Purchase is for one spark plug.

USA domestic shipments are shipped USPS First Class Mail with Tracking

International shipments are shipped USPS First Class International Mail with Tracking

Review:

5 Stars: Up a heat range from the 14YC plug. 

This is a hot plug (Up a heat range) plug for the typical RN or RC 14YC applications.
The RN or RC 12YC would be the colder version. (Champion numbers go up for hotter plugs, NGK go down).
If you normally use the 14YC in normal driving then I would leave it alone.
If have a high performance engine and run at high RPM's you might think of going down to the 12YC.
If you use a vehicle that is constantly lugged down, or is constantly stopped and started (Like a Toro Workman, greens keeper type of cart, or a golf cart that is constantly fouling the plug, you should probably give the 16YC5 a try. The '5' is a wide gap designation.