ZDNET (2022) Logo PNG Vector (AI, SVG) Free Download Zdnet Logo Welcome to ZDNET's next chapter ZDNET ZDNet: Features, Alternatives & Analysis (2026). The serrated helix design creates air turbulence in the intake manifold. This turbulence increases the air pressure in the combustion chamber, resulting in increased performance and improved throttle response. The serrated helix combination design also reduces intake whistle that occurs with helix only designs (US PAT 07055513). This Silver Bullet throttle body spacer is precision machined from 6061 T6 billet aluminum for lightweight, high strength, and perfect fit and finish. Its black anodized finish gives a stealthy look. Adding a Silver Bullet Throttle Body spacer lengthens the intake track which helps increase intake air speed, performance and improve throttle response. This Silver Bullet throttle body spacer uses all factory mounting locations, making for a hassle free installation. A supplied gasket provides a perfect seal. Installation Instructions Silver Bullet throttle body spacers create turbulence in the air flow at the point just before entry to the engine increasing performance, as well as improving throttle response and fuel efficiency. Unique Serrated Helix Entry Design Creates Turbulence and Reduces Whistle Sound Increases Air Speed, Improving Performance and Throttle Response CNC Machined from Durable 6061 T6 Billet Aluminum This Part Fits: Year Make Model Submodel 2011 2014 Ford F 150 STX 2011 2014 Ford F 150 XL 2011 2014 Ford F 150 XLT 2011 2014 Ford Mustang Base