What's the WORST thing about owning an automatic? Goofy "T" handle and push-button shift knobs that you cannot change! In the past, if you had one of these style shifters you were stuck. That all changes NOW! This custom engineered part gives you access to the ENTIRE linkup of Sickspeed shift knobs. New Sickspeed Auto Adapter Designed to work seamlessly with most Sickspeed knobs. Shift Faster! No more push-button, just push down on the knob to shift gears. Installs in seconds!! Comes with two sleeve inserts with inner diameter 14mm and 16mm. Top thread only affects what thread pitch shift knobs will fit on the adapter, it does not affect vehicle fitment.