NGK tr 5???
So my question is, today I went to "advanced crap o parts" and asked for NGK tr 55, after I got home I noticed that the salesman gave me TR 5. I went on NGK web site and the TR 5 fits My application but with a .40 gap. I have seen that every one runs .55 or .59 with some running .60 on tr 55. Should I drive all the way back and get a TR 55? or am I ok with the TR 5 at the .40 gap? I am not planning on doing anything other than a cat back exhaust down the road and of course geting rid of that fram air filter. thanks
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