When your 2011 to 2014 Mustang GT vents crankcase pressure, small amounts of oil vapor can enter your intake system and coat your 5.0L V8's inlet tubing, throttle body, and even blower rotors on supercharged Mustangs. The oil coating can cause pretty serious performance losses that can easily be prevented with an oil separator. Each of these high-quality oil separators come with a small tank to store any excess oil and only need to be emptied when you change your Pony's engine oil. Also be sure to check out our selection of 2011-2014 Mustang GT Cat-Back Exhaust Systems!