CVP's exclusive Velocity Emulsion Tube is a direct replacement for stock carburetor emulsion jet holder. Unlike some aftermarket tubes, the Velocity Tube accepts both H-D factory and OEM replacement main jets for ease of tuning. Specially designed to provide a fine vortex pattern atomized mist for an optimal air/fuel mixture without impacting mileage. Available for all 1989-2006 Big Twin, Twin Cam, and Sportster models using CV style carburetors. Direct replacement for OEM 27101-88 jet holder.