The aFe Silver Bullet throttle body spacer fits between the throttle body and intake manifold on N52-powered BMWs, including the 128i, 325i, 328i and 330i. Its patented serrated/helix entry lengthens the intake tract and creates turbulence in the manifold, improving throttle response for dyno-proven gains up to +4 HP and +7 ft-lbs when paired with an aFe air filter, while reducing intake whistle. It is CNC-machined from 6061-T6 billet aluminum with a black anodized finish and includes machined mounting screws.
| Type | Throttle body spacer (Silver Bullet) |
| Material | 6061-T6 billet aluminum |
| Finish | Black anodized |
| Included | Machined mounting screws |
| Fitment | BMW 128i, 325i, 325xi, 328i, 328xi, 330i, 330xi (L6-3.0L N52) |
| Part Number | 46-31011 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2013 | BMW | 128i | Base |
| 2006 | BMW | 325i | Base |
| 2006 | BMW | 325xi | Base |
| 2007-2013 | BMW | 328i | Base |
| 2009-2013 | BMW | 328i xDrive | Base |
| 2007-2008 | BMW | 328xi | Base |
| 2006 | BMW | 330i | Base |
| 2006 | BMW | 330xi | Base |
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Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
