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Are you looking at them in the dark or Daylight? Usually the glowing pipes come from unburnt fuel in the exhaust, does it smell gassy or black smoke when you nail the throttle?
What controller and what air filter are you running?
 

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I don't think it's a problem if it's not throwing any black smoke. You might be leaving a little power on the table if the A/F isn't optimum but if it's running good for you, pulls hard all the way thru the RPM range with no flat spots and doesn't over heat Then I wouldn't worry to much about it. The symptoms for either to rich or to lean are very simular somtimes.

Out of curiosity, have you tried my custom LTE map?
 
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