Milwaukee Twins Rear Master Cylinder Cover For Harley FL FX The Milwaukee Twins Rear Master Cylinder Cover enhances your motorcycle's appearance with its sleek, chrome-plated stamped steel design. It conceals the bulky rear master cylinder for a sleeker, more polished look. A simple addition that significantly elevates your bike's aesthetic. Formerly offered under the J&P Cycles brand. Features: Made from stamped steel Chrome plated Hides the unsightly rear master cylinder Replaces OEM 41737-63