Premium performance plugs with a unique electrode shape featuring Diamond Fire technology that maximizes the spark plugs power
Electrode combines three types of performance and new technology for improved flame kernel shape
Flame front ignites the bulk air/fuel mixture faster, moves heat into the combustion chamber faster and creates a more localized pressure front for faster pressure rise during power stroke for more complete combustion and an improvement in engine performance
A great plug for many applications but check the E3 website first
Although Dennis Kirk states that they are a replacement for the NGK BR9ES, I had emailed E3 to make sure it was an exact cross reference. An employee at E3 stated that although they will fit and are the same size, the problem is that the NGK plug has an extended electrode and the E3 was shorter and somewhat hidden by comparison. He stated that due to that reason, he could not recommend the E3.31 as an exact replacement. The lady at Dennis Kirk whom I spoke with argued with me that they were made by Powermadd. That is not the case. E3 sold them to Powermadd for distribution. Do your homework before you purchase. I will be returning the E3.31 plugs. I hope they make an exact replacement someday.
I thought I was buying a good high performance plug but apparently they have to be for newer sleds with less emissions. And less amps. But it happened first ride on my 1996 formula SL. And my buddy's 05 sabercat. Will not recommend for older sleds.