AFE BMW Throttle Body Parts for BMW 3 Series F30 (2012+)

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We carry a variety of parts related to BMW throttle bodies and throttle body upgrades. Modern BMWs have electronic throttles that need replacement rather than repair. A malfunctioning unit can disable the car so it's important to pay attention to any fault codes related to the 'EML' system. Older mechanical throttles are much more reliable and less prone to any issues. Replacement of any throttle housing is easy and straightforward.

Larger throttle bodies have been advertised for years as a performance upgrade. On their own they will not make any power difference. But combined with other upgrades, such as larger mass air sensors and intakes, they can contribute to power gains. However, we do not currently sell larger throttle bodies. We do offer adapter plates to mount different throttle housings onto your intake manifold. This is most commonly done along with a stand-alone engine management system with or without drive-by-wire control.
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AFE Silver Bullet Throttle Body Spacer -- F30 BMW N20 2.0L
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
AFE - Corporate Logo
T#:384473
Part#: 46-31009
EO#: D-550-11
In Stock at Vendor
$ 321.99

This product was last offered at the strikethrough price on
01-28-2026

$ 244.99 USD
Free Shipping
$ 244.99 USD
Free Shipping

Silver Bullet throttle body spacers create turbulence in the air flow just prior to entry into the engine increasing horsepower, torque and improving throttle response and fuel efficiency. Silver Bullet throttle body spacers are constructed out of durable 6061-T6 billet aluminum and use a unique serrated/helix entry to create turbulence at the manifold while eliminating the annoying whistle found in other helix-only throttle spacers.

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 helix-only designs.

6061-T6 Billet Aluminum Construction: All Silver Bullet Throttle Body Spacers are constructed from 6061-T6 billet aluminum precision machined 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, performance and improve throttle response.

This Silver Bullet throttle body spacer produces up to 6 hp and 10 lbs. x ft. torque.

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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