Purple Pearl Shift Knob & Adapter For Auto/Automatic Gear Shifter Lever C3 for Pontiac Firebird New Sickspeed Auto Adapter paired with a Pearl knob. These knobs are NOT painted. The color will NEVER rub off or lose its shine! NO SET SCREWS! All-metal threads so your shift knob WON'T wobble or fall off. 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.