I use them, but a colder plug, they work great.
Yes the 5's are colder plug But they run great and less fouling out.
I just put in NGKs today and it fired right up.
I'm running NGK BKR7E plugs, gapped to 0.028 with APR's K04 program and its working fine.
There was a considerable difference when I installed my new NGK plugs. My engine revved up easier and the fuel efficiency increased.
good plugs, cheap, and I get zero misfires at 0.028\" gap on a chipped K03 Sport.
They work beautifully. I've been using them for the past 24,000 miles. I change them every oil change (hey, they're cheap) and they seem to be the smoothest that i'v tried.
28R, NGKBKR7Es - 0.028" Change every 8K miles. Only $2.30 a piece, and I run lots of race fuel
Mine popped up with the NGK's all i did is tighten the spark plug a little more and it stopped.
I put in a set of BP6ES today, gapped to .022", and had every bit the misfiring problems as before, and probably a bit more severe and more frequent.
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