Envy Reaper Bars are constructed from aluminum, making them a force to be reckoned with. Weighing in at a mere 850 grams, they are going to be noticeably lighter than most chromoly bars. These bars are great, but if you are a rider who shreds hard and has a tendency to break bars, we would advise purchasing a chromoly bar instead for more durability. These bars are slitted, so they are compatible with IHC, mini HIC and threaded compression systems. If you are using ICS a star nut will have to be installed into the bars. If you cut the bars and remove the slit, the bars will be compatible with full size SCS. These bars will not work with HIC. If you have any questions regarding fitment with your future or current setup, please feel free to give us a call.