ModifyStreet Fatboy Style Aluminum Tall Shift knob - Silver Anodized/Carbon Fiber 140g Aluminum JDM Fatboy type screw type tall shift knob Size: 2.5" x 1.5" Made of high quality aluminum in silver anodized finish w/ carbon fiber Design for replacing manual transmission with 8mm and 1.25mm pitch (M8 x 1.25), 10mm and 1.25mm pitch (M10 x 1.25), 10mm and 1.5mm pitch (M10 x 1.5) or 12mm and 1.25 pitch (M12 x 1.25) thread shifter. You can also apply these shift knob on your automatic if your shifter is M8 x 1.25, M10 x 1.25, M10 x 1.5 or M12 x 1.25 round thread, and do not require a push button to shift Comes with 3 universal threaded adapter hoses: 4.5/16" (M8 x 1.25) and 5/16" (M10 x 1.25), 5/16" (M10 x 1.5) for installation. The original shift knob thread is M12 x 1.25 so if you car is with M12 x 1.25 thread, you can install without using any adapter.