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Just got a set of NGK TR55's and out of the box, they're all gapped at .057. Do you think it would matter to leave them at .057 or should I go to .060?? :-? :-? A friend of mine has a GMC 1500 with a terrible miss. He pulled the plugs, all gapped at .050, regapped at .060 and the miss is gone.

Will .003 make a diifference?? :cheers:
 

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GRSZ06 said:
Just got a set of NGK TR55's and out of the box, they're all gapped at .057. Do you think it would matter to leave them at .057 or should I go to .060?? :-? :-? A friend of mine has a GMC 1500 with a terrible miss. He pulled the plugs, all gapped at .050, regapped at .060 and the miss is gone.

Will .003 make a diifference?? :cheers:

It would be IMPOSSIBLE to tell a difference between .057 gap and .060 gap, not SOTP, not on a dyno, and not at the track.

Install them as gapped and forget about it.
 
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