I've googled the NGK zfr 5&4 f's and I cant get a match for my Prelude motor. The ZFR6F's clean the plug too much under boost to where I cant tell if it's a go or no go on idnition advance. DMC1 also see this when he was over trying to help me get her going before the Ching Chong blew a seal. Where do you guys go to get colder plugs for PRELUDE's H22A's or if you know where to go post up.

 

isnt it colder the higher you go..., i normaly run ngk plugs that have a 7 at the end and i was told there the coldest i could get from shucks..., work great on my boosted ls

 

Ok your right I need the NGK P# 2975 which is the zfr7f. But there isnt a match for the prelude. Do they share the same thread patterns?

 

i belive most honda plugs are the same, ive used b plugs in a d

 

 

kragen

 

hahahahaha




no sertiously...

napa part 4950

 

the ones i have have a 7 at the end of the part number. as far as i know honda plugs are the same no matter what

 

ive got 7's too..or you could just stick your plugs in the freezer for a little while..

 

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