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. PartNumber : afe46-38004 Description : Silver Bullet Throttle Body Spacer 2003-2008 Toyota 4Runner Limited V8.4663cc Air Intake Systems::Throttle Body Spacers 2003-2008 Toyota 4Runner Sport V8.4663cc Air Intake Systems::Throttle Body Spacers 2003-2008 Toyota 4Runner SR5 V8.4663cc Air Intake Systems::Throttle Body Spacers 2005-2008 Toyota Sequoia Limited V8.4663cc Air Intake Systems::Throttle Body Spacers 2005-2008 Toyota Sequoia SR5 V8.4663cc Air Intake Systems::Throttle Body Spacers 2005-2009 Toyota Tundra Base V8.4663cc Air Intake Systems::Throttle Body Spacers 2005-2009 Toyota Tundra Limited V8.4663cc Air Intake Systems::Throttle Body Spacers 2005-2009 Toyota Tundra SR5 V8.4663cc Air Intake Systems::Throttle Body Spacers