BR8EG is the stock plug.
Looks like they've given you a non resistor racing plug thats a colder heat range. I'd personally not run it.
http://www.math.uwaterloo.ca/~rblander/NGK.txt
You can get a BR8ES for around $5 - I have heaps of these laying around a spares and they seem to work just as well as the stock BR8EG.