aFe 46-32011 Silver Bullet Throttle Body SpaceraFe 46 32011 Silver Bullet Throttle Body Spacer Straight through Design: This Silver Bullet throttle body spacer is designed with a smooth CNC machined interior for the smoothest air flow possible and increased manifold volume. Dual ports are easily accessible to use as vacuum ports or for any other accessories, and can be sealed with the provided 1 8 NPT plugs when not in use. 6061 T6 Billet Aluminum Construction: This Silver Bullet throttle body