Electronic Gurus

Two of these would do it. Wire one to provide white led ground up to desired rpm then it would remove ground and wire the second one to have open ground for red until that same rpm is reached where the white goes out, this would provide ground for the red. Never tried it but seems like it should work. Kind of pricey but:dontknow::dontknow::dontknow:


http://m.summitracing.com/parts/sum-830449-1


Instructions
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