AFE Silver Bullet Throttle Body Spacer 2012-2015 Honda Civic Si / 08-13 Honda Accord ,09-13 Acura TSX ,13-15 Acura ILX (2.4L)The Silver Bullet throttle body spacer is constructed from precision machined 6061 T6 billet aluminum and is designed using a serrated 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 fuel charge burn completely providing increased horsepower, torque and improved throttle response. In recent testing this spacer produces up to 10 HP and 8