Hamburger Torque-Flow Carburetor Spacers are designed with power in mind and CNC-machined from durable 6061-T6 billet aluminum. These spacers use tapered venturi to ensure the best flow of air and fuel possible, resulting in improved throttle response, torque and overall power. Hamburger Open Plenum Carburetor Spacers are used to lengthen the runner between the carburetor and manifold. These spacers enable you to fine tune your engine's power and torque curve to meet track and atmospheric conditions. Each Hamburger's Spacer is packaged with all the gaskets and hardware needed for a quick hassle-free installation.