Enhance throttle response and airflow with the aFe 46-38011 Silver Bullet Throttle Body Spacer, engineered to fit a wide range of Toyota 4.0L V6 applications. This precision CNC-machined billet aluminum spacer features a patented serrated/helix entry design that increases air turbulence just before it enters the intake manifold—resulting in improved throttle response, airflow velocity, and power gains.
Dyno-proven to deliver up to +6 horsepower and +9 lb-ft of torque, the Silver Bullet Spacer also helps smooth airflow for a more responsive driving experience. Unlike other spacers, aFe’s design reduces whistle noise while enhancing engine efficiency.
This spacer is fully compatible with aFe’s own intake systems (P/N: 51/54/75-76009 and 51/54/75-76010) and many factory airboxes.
Key Features:
-
Part Number: 46-38011
-
Gains: Up to +6 HP and +9 lb-ft torque (dyno-tested)
-
Construction: CNC-machined 6061-T6 billet aluminum
-
Design: Serrated/helix entry for turbulence and smoother airflow
-
Sound: Minimizes whistle commonly associated with spacers
-
Performance: Increases air speed, improves throttle response
-
Compatibility Note: Works with aFe intake systems 51/54/75-76009 and 76010
-
Install: Bolt-on with included hardware and gaskets
-
Warranty: Backed by aFe's limited warranty
Vehicle Fitment – Gas V6 4.0L:
-
2010–2024 Toyota 4Runner
-
2010–2014 Toyota FJ Cruiser (U.S. market)
-
2015–2023 Toyota FJ Cruiser (Non-U.S. market)
-
2010–2023 Toyota Land Cruiser Prado (Non-U.S. market)
⚠️ Emissions Note:
Some or all applications are 50-state legal. Please refer to CARB EO D-550-42 for specific details.
What’s Included:
-
1 x aFe Silver Bullet Throttle Body Spacer (Part #46-38011)
-
Gasket(s)
-
Mounting Hardware
-
Installation Instructions