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Discussion Starter #1
on my new sled it says to run BR9EYA spark plugs...what is the difference from BR9EYA to BR9ES????
 

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The only difference is the BR9EYA is an anti-fouling plug, my book say's to use BR9ES, I switched to BR9EYA because cat's have more of a tendency to foul plugs, on 9ES is one week I fouled over 4 plugs, on EYA not 1 in a full season.
 

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Discussion Starter #3
alright thanks....the plugs in it now are br9eya's but i have a couple br9es;s here so i guess i will use up those and then switch to br9eya's
 

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Make sure you use them in set's don't mix them up.
 

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nope no damage. I run the EYA's in my 1990 Indy 500.
 

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Thanks ZRT 600. I didn't know this. I wondered why I was fouling so many plugs. It always seems to be the same cylinder too. Any idea why?
 
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