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aFe POWER 46-31009 Silver Bullet Throttle Body Spacer

BMW 328i (F30) 12-16 L4-2.0L (t) N20/N26
Part Number: 46-31009

MSRP: $354.00

In Stock. Will ship within 1-2 business days.


  • In-house Dyno testing resulted in max gains up to +6 HP and +10 lbs. x ft. of torque
  • Billet Aluminum 6061-T6 Construction
  • Serrated/Helix Combination TBS Design for optimum airflow into the combustion chamber, precision machined from 6061-T6 aluminum.
  • Installation is a Snap
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This Silver Bullet throttle body spacer produces up to 6 hp and 10 lbs. x ft. torque and is constructed from precision machined 6061-T6 billet aluminum. Using a serrated/helix design, this spacer 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. This spacer works with the OE and aFe Power cold air intake systems.

Serrated/Helix Design: The Serrated/Helix combination design creates intake turbulence in the combustion chamber. This turbulence breaks up the fuel which creates a more complete combustion cycle increasing horsepower, torque and improving throttle response. The Serrated/Helix combination design also reduces intake whistle that occurs with other Helix only designs.

6061-T6 Billet Aluminum Construction: All Silver Bullet Throttle Body Spacers are precision machined from 6061-T6 billet aluminum for light weight, high strength and perfect fit and finish.

Longer Intake Track: Adding a Silver Bullet Throttle Body spacer lengthens the intake track which helps increase intake air speed increasing performance and improved throttle response.

This throttle body spacer is 50-state legal (CARB E.O Number D-550-11/D-550-17).

Also Fits:
2014-2016 BMW 220i/228i (F22) L4-2.0L (turbo) N20 (CARB 2014 models 220i/CARB 2014-2015 models 228i)
2013-2016 BMW 320i/ix (F30/31/34) L4-2.0L (turbo) N20
2012-2016 BMW 328ix (F30) L4-2.0L (turbo) N20/N26 (CARB 2012-2013 models)
2013-2016 BMW 328i/ix (F31/F34) L4-2.0L (turbo) N20/N26 (CARB 2012-2015 models)
2014-2016 BMW 420i/ix (F32/33) L4-2.0L (turbo) N20/N26 (CARB 2014 models)
2014- 2016 BMW 428i/ix (F32/33/36) L4-2.0L (turbo) N20/N26 (CARB 2014-2015 models)

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