Our new adjustable Improved Trail (IT) cam arms replicate the factory profile and shift characteristics. Our adjustable cam arms are perfect for making RPM adjustments when engine modifications are made or when making tire size changes or changes for altitude. The IT cam arm up shifts and back shifts identically to factory cam arms, except they can be adjusted for weight. You can now adjust the weight in seconds by simply adding or subtracting set screws. You can make up to 7 grams of adjustment without removing your cam arms or drive belt. Each kit includes a selection of set screws and an allen wrench. Fits all RZR 900 & 1000.