The silver bullet throttle body spacer is constructed from precision machined 6061-T6 billet aluminum and is designed using a serrated or helix design that creates turbulence in the air flow at the point just prior entry into the engine optimizing the combustion cycle. This turbulence helps the air or fuel charge burn completely providing increased horsepower, torque and improved throttle response. During testing, silver bullet throttle body spacers have resulted up to +10 horsepower and up to +14 pound x feet of torque maximum gains. Serrated or Helix design: The Serrated or Helix combination design creates intake turbulence in the combustion chamber. This turbulence breaks up the fuel which creates a more complete combustion cycle increasing horsepower, torque and improving throttle response. The Serrated or Helix combination design also reduces intake whistle that occurs with other Helix only designs. 6061-T6 billet aluminum construction: All silver bullet throttle body spacers are precision machined from 6061-T6 billet aluminum for light weight, high strength and perfect fit and finish. Longer intake track: Adding a silver bullet throttle body spacer lengthens the intake track which helps increase intake air speed increasing performance and improved throttle response. Note: This throttle body is not CARB exempt at this time and is not legal for sale in California or use on vehicles registered with the California Department of Motor Vehicles.