Silky smooth action is what you can expect from the Pro Circuit Throttle Tube thanks to the use of Teflon®. Pro Circuit coated the interior of their throttle tube to dramatically reduce friction for superior performance and long-lasting durability. It is also constructed of CNC-machined aluminum in order to provide superior strength to the stock tube. The Pro Circuit Throttle Tube leaves out the guessing and matches the factory throttle pitch exactly. CNC-machined and PTFE coated. Stronger and more durable than O.E.M. plastic units. Sold individually.