Well, it makes sense that a good ground is important... any resistance that is within the grounding point(s) will create voltage drops, creating inefficiency... I wouldn't spend a ton of money on their kits on eBay, but I plan to add extra ground straps from motor, frame, and body along with a good negative cable on my VX whenever I might get the new motor in for good... I will be running Monster Power 2gauge cable from power and grounds. If there is any difference in performance though, I wouldn't expect it to be perceivable. Just my two cents.

TTYL!

Coach... I mean Randy (I often forget who I really am)

Undergoing LS1 Conversion as we speak!
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