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. This Silver Bullet throttle body spacer is precision machined from 6061-T6 billet aluminum for lightweight, high strength, and perfect fit and finish. The clear anodized finish prevents corrosion and our laser etched logo gives it a finishing touch. This Silver Bullet throttle body spacer uses the factory bolt pattern, making for a hassle-free installation. A supplied gasket provides a perfect seal