Black/White Rally Stripe Shift Knob & Auto/Automatic Adapter For Gear Lever G2 for Ford Mustang New Sickspeed Auto Adapter paired with a rally stripe knob. Shift Faster! No more push-button, just push down on the knob to shift gears. Perfectly sized at 2 1/8" diameter, the 4oz design feels ROCK-solid in your hand. Installs in seconds!