The CarbonSmith 2016-2018 Kawasaki ZX10-R Velocity Stacks were designed to make excellent mid-range power vs stock stacks and provide a much more manageable power curve. We measured +14 HP and +6 ft lbs of tq at 11,000 RPM vs stock stacks while creating a much more linear curve. MANUFACTURED WITH NYLON EMBEDDED CARBON FIBER REINFORCED WITH CONTINUOUS CARBON FIBER. �THIS MAKES THEM EXTREMELY STRONG, LIGHTWEIGHT, YET FLEXIBLE AND VERY RESISTANT TO HEAT AND CHEMICALS . � INCLUDES LEFT AND RIGHT STACK SET USES STOCK HARDWARE FOR INSTALLATION RESULTS WILL VARY DEPENDING ON ENGINE BUILD AND TUNING CAPABILITIES NO HEAT DEFLECTION UNDER 300 DEGREES F WILL NOT DEFORM FROM HARSH RACE FUELS OR NITROUS In order to maintain our extremely high standard of quality products, CarbonSmith VELOCITY STACKS are not available in mass quantities and are made to order. �Each KIT takes over 30 hours of print time and are MADE TO ORDER , therefore your patience is very much appreciated. PLEASE READ OUR TERMS & CONDITIONS BEFORE PURCHASING, THANK YOU!