Bolt-on performance for aggressive trail riders, lake racers, cross-country racers or radar-run racers who have to be in front of the packThe most aggressive acceleration; reaches top speed quicker without losing dependabilityDelivers in all areas; tremendous low-end and mid-range performance increasesImproves backshifting characteristics of the factory setup for smooth operation; keeps engine operating at correct rpm to keep power on tap when you need itEach is tuned to its specific application to ensure uncompromised performanceHelixes are 7075 T-6 aluminum; clutch springs made from highest-quality materials utilizing only a 5% tolerance; bushed/balanced weightsUse of traction products highly recommended with this productKits designed for 0 ft. to 2,000 ft. altitude