AFE SILVER BULLET THROTTLE BODY SPACER - TOYOTA TACOMASilver Bullet throttle body spacers create turbulence in the air flow at the point just prior to entry of the engine increasing performance, as well as improving throttle response. Constructed from Durable 6061 T6 Billet Aluminum Unique Serrated Helix Entry Design Creates Turbulence and Eliminates Whistle Sound Increases Air Intake Speed, Improving Performance & Throttle Response Serrated Helix Design: The Serrated Helix combination design creates