journeyman
Active member
I know my Viper is supposed to run the NGK BR9ES sparkplug. Recently I was at Fleetfarm where they normally have a good stock of NGK plugs but they had no BR9ES plugs.....not even a slot for them on the shelf. The closest they had was the BPR9ES. According to the NGK catalog the "P" stands for projected......as in the electrode. Has anyone used these on a stock Viper? If so how did they work in comparison?