BLOX Racing FR-S Style Shift Knob - SilverSuits: Subaru BRZ and other vehicles using 12x1.25 reverse lock-out lever transmissions The BLOX Racing FR-S style shift knob is CNC-machined from high quality, billet AL6061-T6. After the shifts knob have been machined to exact specifications, each one is then hand-polished. Each shift knob is weighted to 189 grams and undergoes Mil-spec Type II anodizing process. The FR-S style shift knob is designed to accept any vehicle with a 12x1.25 reverse lock-out lever. Shift knob does not require any adapter or lock-nut.