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Very nice!!! to gain 5 WHP with all those mods already is pretty amazing!!! I wounder how much it would bump up a stock K20?!?! This will def be my next mod. I'll be ordering it pretty soon. Hopefully the gains on the R18 will be just as good if not better. I don't know what the weight reduction is on the Si but I know it's 4+ lbs on the R18!!!
UDP FTW!
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