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Bosch FGR7DQP vs. NGK BKR6EQU(P)

84K views 31 replies 25 participants last post by  evilstar  
My car was also running fine when I changed to +4s at 50K.
It runs better now. No gapping required. You worry too much. Change the plugs every 50-60K not 100K! Believe me, your coil packs will thank you.