I installed Brisk plugs about 2k miles ago the car ran great seemed to pull harder, I was qutie pleased. The past few days I started to get a miss at 5k to 6k rpm. I pulled the plugs and reinstalled my HTO's, they have about 2k miles on them also. The miss is now gone. I know some have had good luck with them but not me. They are quite expensive to have only lasted 2k miles, I will keep the HTO's.

 

They are a racing spark plug, they aren't made to last.

 

I have about 2500 and so far so good on my brisks. :fingers crossed: