Fits select 2004-2010 Ford F-150, F-250/F-350 Super Duty, Expedition, and Lincoln Mark LT (V8-5.4L).

The aFe Power Silver Bullet throttle body spacer is engineered to improve off-idle torque and throttle response by optimizing the air-fuel charge entering the engine. Precision-machined from T-6061 billet aluminum, this spacer features a unique serrated and helix-shaped entry design. This combination creates high-velocity turbulence within the intake manifold, leading to better air-fuel atomization and more complete combustion. Unlike standard helix spacers, the Silver Bullet design is specifically tuned to eliminate the annoying whistling sound often associated with throttle body spacers.

• Precision machined from durable T-6061 billet aluminum
• Serrated/helix entry design increases air turbulence for better performance
• Engineered to eliminate high-pitched whistling sounds
• Increases intake manifold volume for improved throttle response
• Compatible with factory and aFe Power intake systems
• Manufacturer Part Number: 46-33002
• Includes a 2-year limited warranty

Fits select 1997-2010 Ford F-150, F-250/F-350 Super Duty, Excursion, Expedition, and Lincoln Mark LT/Navigator (V8-5.4L).

The aFe Silver Bullet throttle body spacer improves mid-range torque and throttle response by optimizing the air intake path. Precision-machined from high-grade T-6061 billet aluminum, this spacer features a unique serrated/helix entry design. This combination creates a turbulent vortex of air just before it enters the intake manifold, leading to more complete combustion and increased cylinder filling. Unlike standard helix-only spacers, the serrated entry eliminates the high-pitched whistling sound typically associated with these components.

Designed for a straightforward installation, this spacer increases intake plenum volume to improve performance across the power band. It is fully compatible with aFe Power intake systems and utilizes factory mounting locations for a secure fit.

• Precision machined from T-6061 billet aluminum for durability
• Serrated/helix design creates air turbulence without the annoying whistle
• Increases air volume for improved horsepower, torque, and fuel efficiency
• Compatible with aFe Power intake systems
• Manufacturer Part Number: 46-33001
• Includes a 2-year limited warranty

Fits select 2015-2025 Dodge Challenger, Charger, Durango, Jeep Grand Cherokee, and Ram 1500 (V8-6.2L).

The aFe Power Silver Bullet throttle body spacer is engineered to optimize airflow and increase manifold volume for the supercharged 6.2L Hemi engine. Precision CNC-machined from 6061-T6 billet aluminum, this spacer features a smooth interior bore to reduce turbulence and improve intake velocity. To protect against corrosion and maintain a professional appearance under the hood, each spacer is finished in a clear anodized coating with a laser-etched logo.

A key feature of the Silver Bullet series is the inclusion of dual 1/8” NPT ports. These ports allow for easy integration of vacuum gauges or water-methanol injection systems. When not in use, the ports are sealed with the included NPT plugs. The spacer is designed for a direct bolt-on installation using the factory mounting pattern and comes complete with all necessary hardware and a new gasket for a leak-free seal.

• CNC-machined from high-strength 6061-T6 billet aluminum
• Clear anodized finish for superior corrosion resistance
• Smooth bore design increases manifold volume and improves airflow
• Includes two 1/8” NPT ports for vacuum accessories or methanol injection
• Direct-fit installation using factory bolt pattern
• Manufacturer Part Number: 46-32011

Fits select 2005-2024 Chrysler 300, Dodge Challenger, Charger, Durango, Magnum, Jeep Grand Cherokee, Grand Wagoneer, and Ram 2500/3500 (V8-6.4L).

The aFe Power Silver Bullet throttle body spacer improves mid-range torque and throttle response by optimizing the air intake path. Precision-machined from high-grade T-6061 billet aluminum, this spacer uses a unique serrated/helix design to create air turbulence at the manifold entry. This specialized geometry increases air velocity and improves the combustion cycle for better engine efficiency.

Unlike standard helix-only spacers that can produce an audible whistling sound during acceleration, the Silver Bullet’s serrated entry is engineered to break up the air pressure to eliminate noise while maintaining maximum flow. This is a direct-fit upgrade that installs easily with the included gaskets and hardware, bolting between the throttle body and intake manifold.

• Precision machined from durable T-6061 billet aluminum
• Unique serrated/helix design for increased air velocity and turbulence
• Engineered to eliminate common intake whistling noises
• Improves throttle response and mid-range torque
• Includes high-quality gaskets and installation hardware
• Manufacturer Part Number: 46-32007
• 2-Year Limited Warranty

Fits select 2007-2026 Chrysler, Dodge, Jeep, and Ram vehicles (V8-5.7L).

Optimize your 5.7L Hemi's performance with the aFe Power Silver Bullet Throttle Body Spacer. This precision-engineered component increases horsepower, torque, and throttle response by creating air turbulence at the point of entry into the engine. This turbulence helps the air-fuel mixture burn more efficiently, providing noticeable gains in low-end power and mid-range performance.

Constructed from high-grade T-6061 billet aluminum, the Silver Bullet features a unique serrated/helix entry design. Unlike traditional helix-only spacers that can produce an annoying high-pitched whistle, aFe's serrated edge breaks up the air more effectively, eliminating noise while maximizing air volume. This spacer is designed to bolt directly to the factory mounting points and is compatible with both OE and aFe Power intake systems.

• Material: Precision-machined T-6061 billet aluminum
• Design: Serrated/Helix entry for maximum turbulence without whistling
• Installation: Direct bolt-on to factory mounting points
• Compatibility: Fits with factory and aFe Power intake systems
• Warranty: 2-Year Limited Warranty
• MPN: 46-32005

Fits select 2000-2010 Dodge Dakota and Durango models (5.7L).

The aFe Silver Bullet throttle body spacer is engineered to improve off-idle torque and throttle response by optimizing the airflow into your intake manifold. Precision-machined from high-grade T-6061 billet aluminum, this spacer features a unique serrated/helix entry design. This profile creates a turbulent air vortex that helps atomize the fuel-air charge for more efficient combustion while specifically eliminating the high-pitched whistle common with standard helix-only designs.

This TBS increases the effective volume of your intake manifold, providing more air for the engine to draw from during acceleration. It is a direct bolt-on upgrade that installs easily with the included hardware and gaskets.

• Precision-machined from durable T-6061 billet aluminum
• Unique serrated/helix entry creates performance-enhancing turbulence
• Increases intake manifold volume for better throttle response
• Eliminates the annoying whistling sound common in other spacers
• Compatible with factory and aFe Power intake systems
• Manufacturer Part Number: 46-32003
• 2-Year Limited Warranty

Fits select 2003-2009 Dodge Ram 1500/2500/3500, Durango, Charger, Magnum, and Chrysler 300 (V8-5.7L).

The aFe Silver Bullet throttle body spacer is engineered to optimize airflow and boost engine performance. By utilizing a unique serrated/helix entry design, it creates high-velocity turbulence in the intake tract just before the manifold. This turbulence helps the air-fuel mixture atomize more completely, which improves throttle response and provides measurable gains in both horsepower and torque.

CNC-machined from durable T-6061 billet aluminum, this spacer is built to withstand the heat and vibration of your engine bay while ensuring a perfect fit. The specialized serrated design is specifically engineered to eliminate the high-pitched whistling sound often associated with standard helix spacers, providing quiet performance. Please note that this specific model is designed for use only with aFe intake systems utilizing the 5x-10382 filter or housing configuration.

• Precision CNC-machined from T-6061 billet aluminum
• Unique serrated/helix design maximizes air turbulence for better combustion
• Increases horsepower, torque, and throttle response
• Engineered to eliminate annoying intake whistling
• Compatible with aFe intake systems (Requires 5x-10382)
• Manufacturer Part Number: 46-32002
• Includes a 2-year limited warranty

Fits select 1994-2003 Dodge Ram 1500, 2500, and 3500 (5.9L). This aFe Power Silver Bullet throttle body spacer is designed to optimize the intake tract for improved throttle response and increased horsepower. By creating air turbulence at the point of entry into the intake manifold, the spacer improves the combustion process through better air-fuel atomization.

Precision machined from high-strength T-6061 billet aluminum, this spacer features a unique serrated/helix entry design. This specific geometry generates the necessary turbulence for performance gains while effectively eliminating the high-pitched whistling sound common with standard helix-only spacers. The Silver Bullet is compatible with factory intakes and aFe Power intake systems, providing a simple bolt-on solution for increased air volume.

• CNC-machined from durable T-6061 billet aluminum
• Unique serrated/helix design increases air turbulence
• Eliminates annoying whistling common with other spacers
• Improves throttle response, horsepower, and torque
• Compatible with factory and aFe Power intake systems
• Includes all necessary hardware for installation
• Manufacturer Part Number: 46-32001
• 2-Year Limited Warranty

Fits select 2006-2013 BMW 128i, 325i, 325xi, 328i, 328i xDrive, 328xi, 330i, and 330xi (L6-3.0L N52).

The aFe Power Silver Bullet throttle body spacer is engineered to improve throttle response and mid-range torque by optimizing the airflow into your intake manifold. It features a patented serrated/helix design (US PAT 07055513) that creates turbulence just before the air enters the combustion chamber. This increased air velocity and pressure result in improved combustion efficiency and overall performance gains. The unique entry design is also specifically tuned to reduce the intake whistle sound common with standard helix-style spacers.

Each Silver Bullet is precision CNC-machined from 6061-T6 billet aluminum, providing a lightweight yet high-strength solution with a stealthy black anodized finish. The kit includes high-quality machined screws for a secure installation that bolts directly to the factory manifold without damage. This spacer is compatible with both the factory airbox and several aFe Power intake systems.

• Dyno-proven gains up to +4 HP and +7 lbs. x ft. torque when used with aFe Power P5R air filter (30-10131)
• Dyno-proven gains up to +3 HP and +5 lbs. x ft. torque with factory air filter
• Patented serrated/helix entry increases air speed and reduces whistle
• Precision CNC-machined from 6061-T6 billet aluminum
• Corrosion-resistant black anodized finish
• Fits aFe Power intake P/N: 51/54-81012-B, 51/54-81012-C, and 54-13053D/R
• Includes all necessary installation hardware
• Manufacturer Part Number: 46-31011

Fits select 2012-2018 BMW 228i, 320i, 328i, and 428i models including xDrive, GT, and Gran Coupe (L4-2.0L N20/N26).

The aFe Power Silver Bullet throttle body spacer is designed to optimize the air intake path for improved engine performance. By creating turbulence in the airflow at the point just before entering the intake manifold, this spacer helps provide a more complete fuel-air charge. This results in measurable improvements in throttle response and mid-range torque.

Precision machined from high-strength T-6061 billet aluminum, the Silver Bullet features a unique serrated/helix entry design. Unlike standard helix spacers that often produce a high-pitched whistling sound, this serrated combination is engineered to generate the necessary turbulence while maintaining quiet operation. The increased plenum volume further aids in air velocity and combustion efficiency.

• Manufacturer Part Number: 46-31009
• Precision machined from T-6061 billet aluminum for durability and exact tolerances
• Unique serrated/helix design increases air turbulence without the whistle
• Compatible with factory and aFe Power intake systems
• Includes all necessary hardware for a straightforward installation
• Manufacturer Warranty: 2 Year Limited

Fits 2001-2006 BMW 325i, 325Ci, and 325xi (L6-2.5L).

Improve your engine's volumetric efficiency and throttle response with the aFe Silver Bullet Throttle Body Spacer. Precision-machined from durable T-6061 billet aluminum, this spacer is designed to increase manifold pressure by creating air turbulence at the point of entry. Unlike standard spacers that can produce an audible whistle, the Silver Bullet features a unique serrated/helix design that breaks up the air stream to optimize combustion while maintaining quiet operation.

• Precision machined from T-6061 billet aluminum for exact tolerances
• Unique serrated/helix entry creates turbulence for improved air/fuel mixing
• Designed to eliminate the whistling sound common in other helix spacers
• Increases air volume to the manifold for improved horsepower and torque
• Compatible with factory and aFe intake systems
• Manufacturer Part Number: 46-31008
• Includes a 2-year limited warranty

Fits select 2011-2016 BMW 135i, 335i (F30), 435i (F32), M235i, and X1 models.

The aFe Power Silver Bullet throttle body spacer is engineered to improve mid-range torque and throttle response by optimizing the airflow path into your engine's intake manifold. Precision-machined from T-6061 billet aluminum, this spacer utilizes a specialized serrated/helix entry design. This geometry creates air turbulence at the manifold entry point, promoting a more thorough fuel-air mixture while specifically eliminating the high-pitched whistling noise often associated with standard helix designs.

• Precision machined from durable T-6061 billet aluminum
• Unique serrated/helix design increases air turbulence and volume
• Eliminates annoying whistling common in helix-only spacers
• Provides gains in horsepower, torque, and throttle response
• Compatible with factory and aFe Power intake systems
• Manufacturer Part Number: 46-31007
• Includes a 2-year limited warranty

The aFe Silver Bullet throttle body spacer is engineered to improve throttle response, torque, and fuel efficiency for select 2000-2010 BMW 5 Series, 6 Series, 7 Series, and X5 models (V8-4.8L). By creating turbulence in the airflow just before it enters the intake manifold, this spacer optimizes the air-fuel mixture for more efficient combustion.

• Precision Construction: CNC-machined from durable T-6061 billet aluminum for exact tolerances and long-term reliability.
• Serrated/Helix Design: Features a unique serrated and helix entry that generates the necessary turbulence to increase air volume while eliminating the high-pitched whistling sound common with lesser helix-only spacers.
• Bolt-On Performance: Designed to work seamlessly with both factory and aFe Power intake systems.
• Complete Kit: Includes all necessary gaskets and hardware for a straightforward installation.

Specifications:
• Material: T-6061 Billet Aluminum
• Finish: Machined
• Part Number: 46-31006
• Warranty: 2-Year Limited Warranty

Fits select 1992-1999 BMW M3 and M5 (3.2L). This aFe Power Silver Bullet throttle body spacer is precision-machined from 6061-T6 billet aluminum to optimize air intake for improved combustion efficiency.

The Silver Bullet features a unique serrated/helix design that induces turbulence in the airflow immediately before it enters the engine. This turbulence facilitates a more complete air/fuel charge burn, resulting in gains of up to 4 horsepower and 8 lbs. x ft. of torque. This design also improves throttle response and helps eliminate the whistling sound often associated with aftermarket intake spacers.

• Manufacturer Part Number: 46-31004
• Material: Precision machined 6061-T6 billet aluminum
• Performance Gains: Up to 4 HP and 8 lb-ft torque max gains
• Design: Serrated/helix bore creates intake turbulence
• Emissions: 50-state legal for street use
• Warranty: 2-year limited warranty

Fits select 2007-2010 BMW 135i, 335i, 335xi, 535i, 535xi, and xDrive models (L6-3.0L).

The aFe Power Silver Bullet Throttle Body Spacer (MPN 46-31002) is engineered to optimize the air-fuel charge for improved engine efficiency. By creating turbulence in the airflow at the point of entry into the intake manifold, this spacer increases air volume and velocity. This results in enhanced throttle response and improved horsepower and torque figures throughout the power band.

Precision-machined from durable T-6061 billet aluminum, the Silver Bullet features a unique serrated/helix entry design. This specific geometry generates the necessary intake turbulence while effectively eliminating the high-pitched whistling sound often associated with standard helix-only spacers. This unit is designed to bolt onto factory mounting points and works seamlessly with both OE and aFe Power intake systems.

• Precision machined from high-grade T-6061 billet aluminum
• Serrated/helix design optimizes airflow and eliminates whistling
• Increased intake manifold volume for better throttle response
• Compatible with factory and aFe Power intake systems
• Manufacturer Part Number: 46-31002
• Includes a 2-Year Limited Warranty

Fits select 1997-2009 BMW 5 Series, 6 Series, 7 Series, and X5 models. This aFe Power Silver Bullet throttle body spacer is engineered to optimize airflow and increase manifold pressure by creating turbulence at the intake entry point. Precision-machined from T-6061 billet aluminum, this spacer features a unique serrated/helix design that improves air volume and throttle response while eliminating the high-pitched whistling common in lesser helix-only designs.

• Precision-machined from high-strength T-6061 billet aluminum
• Serrated/helix design creates airflow turbulence for improved combustion
• Increases effective intake manifold volume for better throttle response
• Engineered to eliminate intake whistling sounds
• Compatible with aFe Power intake systems
• Direct-fit installation on specified BMW applications
• Manufacturer Part Number: 46-31001
• Includes 2-year limited warranty

Fits 2021-2026 Subaru Crosstrek models, including Limited, Premium, Sport, and Wilderness trims.

The aFe Power Silver Bullet Throttle Body Spacer utilizes a specialized serrated/helix combination design to optimize air velocity and intake turbulence. By creating a vortex at the point of entry to the combustion chamber, this spacer helps break up fuel for a more complete combustion cycle, resulting in improved throttle response and increased horsepower and torque. Unlike standard helix designs that can produce an audible whistle, the serrated entry significantly reduces intake noise while maintaining high-speed airflow.

Every Silver Bullet spacer is precision CNC-machined from high-strength 6061-T6 billet aluminum for a perfect fit and long-lasting durability. The kit features a vibrant orange anodized finish for corrosion resistance and a custom look under the hood. Installation is straightforward and hassle-free, bolting directly to factory mounting locations with no permanent modifications required.

• Unique Serrated/Helix design increases air speed and reduces intake whistle
• CNC-machined from 6061-T6 billet aluminum for precision and strength
• Orange anodized finish for corrosion resistance and engine bay aesthetics
• Uses factory mounting locations for a secure, stable installation
• Manufacturer Part Number: 46-30005

Fits 2014-2018 Mazda 3 models with the L4-2.0L or 2.5L engines.

The aFe Silver Bullet throttle body spacer (46-30002) is precision-engineered to optimize intake airflow for increased horsepower, torque, and improved throttle response. By utilizing a unique serrated/helix entry design, this spacer creates air turbulence just before the intake manifold, allowing for a more complete and efficient air/fuel combustion cycle. This specific design also eliminates the high-pitched whistling noise often associated with traditional helix-only spacers.

Constructed from high-strength 6061-T6 billet aluminum, this spacer is durable enough to withstand engine heat while maintaining precise tolerances. The kit includes all necessary hardware and seals for a straightforward installation to factory mounting points.

• Precision-machined from durable 6061-T6 billet aluminum
• Unique Serrated/Helix design creates turbulence for optimal air/fuel mixing
• Eliminates whistling common in standard helix spacers
• Includes all necessary installation hardware
• Manufacturer Part Number: 46-30002
• 2-Year Limited Warranty

Fits 2016-2025 Mazda MX-5 Miata and Miata RF (L4-2.0L).

The aFe Silver Bullet throttle body spacer is engineered to improve off-idle torque and throttle response. By creating turbulence in the airflow at the intake manifold entry point, this spacer facilitates a more complete air/fuel charge burn for improved efficiency and performance.

Each Silver Bullet spacer is precision CNC-machined from durable 6061-T6 billet aluminum. It utilizes a unique serrated/helix design that generates the specific turbulence needed to mix the air/fuel charge while eliminating the high-pitched whistling sound often associated with standard helix-only spacers.

• Precision CNC-machined from 6061-T6 billet aluminum
• Unique serrated/helix entry design creates turbulence without the whistle
• Helps air/fuel charge burn more completely for improved response
• Increases horsepower and mid-range torque
• Manufacturer Part Number: 46-30001
• 2-Year Limited Warranty