Silver Bullet throttle body spacers create turbulence in the air flow at the point just prior entry into the engine increasing horsepower, torque and improving throttle response and fuel efficiency. Silver Bullet throttle body spacers are constructed out of durable T-6061 billet aluminum and using a unique serrated/helix entry to create turbulence at the manifold while eliminating the annoying whistle found in other helix only throttle spacers. aFe Silver Bullet Throttle Body Spacers are manufactured from the highest quality Aircraft Grade Billet 6061-T6 Aluminum. Each Silver Bullet spacer is specifically designed for your application. Our kits always include the necessary gaskets, hardware, and precision brackets to maintain proper geometry with the factory components. The aFe Silver Bullet Spacer can be installed in less than an hour using common hand tools with no drilling or cutting required.