An AFE Silver Bullet Throttle Body Spacer is an excellent way to increase the horsepower and torque of your vehicle, while still improving your gas mileage. The AFE Throttle Body Spacer twists incoming air to provide a more thoroughly mixed air to fuel ratio. This provides for an increase in horsepower and torque, while improving MPG while cruising. Unlike other throttle body spacers AFE's has serrated edges which decrease the "whistle" at idle and cruising speeds. Improve your vehicle's throttle response and gas mileage with a Throttle Body Spacer by AFE.
Benefits - Increase in MPG
- Improved throttle response
- No annoying whistle
- Increase in horsepower and torque
- High quality billet aluminum construction
Applications (46-31001)- 2000-2006 X5 4.4L/4.6L/4.8L
- 1997-2008 540i
- 2004-2008 645Ci/650i

We're always looking. Right?
AFE Silver Bullet Throttle Body Spacer
My son installed one of these on his Honda Ciic Si. And, here I am at 60yo looking to do the same thing.... But, hey, if it works and gives any kind of increase to power or gas mileage, I'm game.