Highsider Rear Turn Signal Adapter Harley Sportster the Highsider Turn Signal Adapters simplify the installation process of Highsider turn signals by providing accurate and easy integration onto your motorcycle. These adapters are designed to match Highsider's turn signal specifications, ensuring a secure fit and optimal performance Features: Anodized black aluminum turn signal adapters M8 thread diameter Accurate fit for Highsider turn signals (sold separately) Includes necessary mounting hardware Sold as a pair