So are NGK fine Iridium plugs as good as denso iridium motorcraft/autolight or whatever? Basically are these good enough for full bolt-on NA application?

 

no matter what you get just dont get the 4 ground strap plugs like the bosch +4's... they do not work well in a mustang at all. i just run some copper ngk v-powers in my car and they run great. nothing special.

 

yea thats what the guys at dallas mustang mentioned today. i guess i'll change em again, cause i recently put bosch in there unknowingly

 

I run NGK T56s in my car and its an excellent plug. I like mines. I heard a lot of good reviews on E3s as being a good plug and also some horro stories about plug cracking.

 

Motorcraft plugs work fine, and you can get them in a couple of heat ranges.. If not, TR6 NGKs are an excellent plug.

 

Throw some NGK TR6's in there. Gap'em at .050" for N/A and call it a day. I never had a problem with those plugs. They are basic copper plugs. You just need to replace them every 15-20kmi, but for $1.39 a plug you cannot go wrong. I would steer clear from those iridiums especially with multiple bolt-ons. Those are used from the manufacturer for cleaner emissions and 100kmi service intervals. They sound fancy and come with that fancy cost, but are not better than copper plugs

 

good to know, thanks guys. i just didn't even consider bosch to be a mustang no-no as my shop put it.