i'm using SUN HotInaZma Hyper (http://www.sun-auto.co.jp/english/en...zma_hyper.html) with 2 extra grounding cables on my RB1, main unit cables to throttle, intake, engine block. 2 extra to main grounding point and chassis. it makes throttle responds better and feels smoother with acceleration. do not expecting huge difference but definitely help a little. will install extra 3 grounding cables in the future.
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