Which is the better spark plug for 4.3L

[prc03sx195]

Should I put in NGK or AC plugs for my 190 HP 4.3L carb 2003 merc? Which one out performs.
NGK BPR6EFS
AC MR43LTS

paul

 

[Don S]

Re: Which is the better spark plug for 4.3L

Either one will work fine.