Re: LED lights...
I've never done a comparison, for example:
1. LED headlights with relay harness
2. LED headlights without relay harness
But LED's have a much lower load on the electrical system and probably perform quite good without the relay harness. My relay harness was already in place to support some H4 style headlights prior to switching to LED. I personally prefer routing as much power to the headlights as possible but I think you'd be fine without when running LEDs. You will experience much improved headlight performance with LED's that's for certain. Keep us posted if you upgrade, curious to know which headlight you end up with and your feedback on them once installed. Stay safe!
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66 GMC Suburban Custom
66 Chevy K10 Suburban
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