Description THIS WHEEL IS FOR THE HOLSET “MODDED 66MM” H2E & HX55 TURBOS Greatly improves throttle response Increased Horsepower Lower EGTs Easy installation – no modifications needed Increased boost Important tips: Holset turbos use two different style nuts holding the wheel on. If it is a 6 point nut, then tighten to 133 in/lbs. If it is a 12 point nut, then tighten to 124 in/lbs. It is a left hand thread (reverse thread), meaning you turn the nut to the right to loosen.