About 2 am a Harris County Precinct 4 Deputy stopped an Audi on US 59 for a drug investigation. The vehicle sped off and traveled north into Montgomery County. Montgomery County Precinct 4 Deputies assisted in attempting to stop the vehicle which was traveling at 120mph. The driver with a passenger made a u-turn at FM 1485 in New Caney and went back southbound. Units finally got the suspects in custody off Parker Road in Houston.