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I had 5 grams stock and was doing 42 mph.i just put my performance variator on yesterday and it is the best thing I ever did to it.i put 5 grams back in but sliders not rollers and the difference is unbelievable.i have great acceleration and I can hit 45 now.i tried 4 grams and it was really quick but only hit 42.surprised my rpms are down from 8000 to 7000 at the same speed.i mixed mine up with 4s and 5s and I like both the take off and top speed.going down hill with the 5 grams I hit 50 so if I had more power I no I could go faster.people reading this you should buy a performance variator they are awesome.well worth the little bit they cost.i bought a koso from scappy dog but I guess dr pulley is even better
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