are these as good as the ngk vpowers bkr7r-11
Champion Copper Plus 430. RCDYC4

 

I like Champion better, noticed they always seemed to burn a lot better with the stock engine than the NGK BPR-6ES 11 Plugs. But that was in a tropical climate, in-cylinder temps could have been a little different.

 

I bought the Iridium NGK's. They seem to be real good in the tibby.

 

mine are for nitrous applications though