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 : afe46-38008 Description : Silver Bullet Throttle Body Spacer 2010-2014 Toyota 4Runner Limited V6.3956cc Air Intake Systems::Throttle Body Spacers 2010-2014 Toyota 4Runner SR5 V6.3956cc Air Intake Systems::Throttle Body Spacers 2010-2014 Toyota 4Runner Trail V6.3956cc Air Intake Systems::Throttle Body Spacers 2011-2014 Toyota FJ Cruiser Base V6.3956cc Air Intake Systems::Throttle Body Spacers