The grounding kit on my 02 civic helped it greatly, but I don't think it would do noticeable things to the Z. On the civic, every time the radiator fan comes on, the head lights dim, the radio/dash lights dim, etc.. Post grounding kit, I don't have these issues. The Z, IMO, is much better wired OEM than the 02 civic.
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2010 370Z 40 Anniv., 6 MT | Fast Intentions | Swift Springs | SPC | Z1Motorsports | JWM | Redline Oils | 35% Window Tint
2015 Mazda6 | 370ZChicago: Chicago Area Cars & Coffee
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