Renthal Twinring Sprocket - 520 Chain Pitch x 51 Teeth - Silver - 1230-520-51GPSI 1999 Ski-Doo Formula SL The Big Gun EVO Racing

The Big Gun EVO Racing Series was designed to deliver maximum horsepower & torque gains throughout the RPM range

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Renthal Twinring Sprocket - 520 Chain Pitch x 51 Teeth - Silver - 1230-520-51GPSI 1999 Ski-Doo Formula SL The Big Gun EVO RacingRenthal Twinring Rear Sprocket A long lasting durable off road sprocket developed over 5 years. They are CNC machined from a specially enhanced 7075 T6 aluminum alloy The unique flat face design keeps weight to a minimum and means the Twinring rear chainwheel is as narrow as a standard chainwheel. These feature Renthal's self cleaning mud grooves at each tooth to help increase wear resistance The flat socket head screws add additional strength to the