NOS is the same deal on the flats with no load it doesn't seem to make a big diff, however in the deep and under load the added HP then reveals it advantage. Besides the helix on your 09 whats the difference between the 09 and the 08 considering 08 has been updated??i agree with the snow load--last year we had a buddy with a head on his xp and racing it didnt help it at all but when we got to some good deep snow it made a heck of a difference..i think the pipe will be the same ..
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