The R&D Power Sleeve Intake Manifold Sleeve Kit was developed to increase airflow into and through the intake system by relieving restriction. The R&D Intake Manifold Sleeve replaces the OEM intake ribbon producing an unrestricted 40 CFM increase in air flow. The R&D billet sleeve mounts into the intake manifold and extends up into the throttle body creating a superior Venturi effect. The R&D Intake Kit will add low end and mid range throttle response, and a full 100 plus rpms (when coupled with the R&D Power Filter Kit) to top end performance to a stock VXR/VXS. The R&D Intake sleeve is an absolute must have part to remove intake manifold restrictions. True horsepower gains on the Yamaha start right here with the R&D Intake Kit. More airflow will equal more power.