Yes, you can cut bars down, but there are a few things you need to know. First, if it has a slit in the bars, that slit needs to be recreated after cutting the bars shorter. The slit should be in the same spot and the same width and length. Second, if your bars have a starnut inside the bars, such as for ICS, it will need to be pushed further up into the bars equivalent to the amount you cut off.