3 Series 4 Dr enhance your sedan's look. Reduce the throw of your stock gearbox with a Short Shifter. A good way to update the grocery getting is replacing your 3 Series 4 Dr. Short Shifters make changing gears more efficient and reduce 0-60, quarter-mile and overall lap times. Overall Style and performance are improved by changing your 3 Series 4 Dr. A great first modification to your vehicle is a Short Shifter. Reduce the throw and have more go by switching to a Short Shifter.