S&S Cycle S-C581 Air Shifter Kit

The S&S Cycle S-C581 Air Shifter Kit is a complete pneumatic gear-shift system for motorcycles, designed to let riders shift gears rapidly and reliably without using the foot clutch once installed. This kit is marketed as a Newstar product and is listed as a direct replacement for Chelsea part 328388-37X, providing a straightforward upgrade path for bikes that relied on Chelsea/Newstar air-shift hardware. Positioned within the Newstar/S&S lineup, the S-C581 is designed to integrate with existing air-shift components from Chelsea/Newstar, enabling compatibility with established control valves, indicators, and tubing when paired with the proper installation hardware. For riders seeking a factory-backed option to retrofit or upgrade an air-shift system, the S-C581 offers a recognized part number and manufacturer support from S&S, simplifying service and future part replacements.