The hole is a excess fluid bleed hole so that you dont pressure your damber tubes. the CRC tubes are known for binding up after taking a slight hit however i havent heard about them doing that brand new. normally most of the binding comes from the end of the tube where they cut it. to get rid of it try using a body reamer to ream out the large end of the tube slightly. i have tried it in the past for people with CRC damber tubes on their cars and it cures it most of the time