aFe Silver Bullet Throttle Body Spacer for 2021–2026 Lexus IS350 3.5L V6 – 46-38014

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. 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. This Silver Bullet throttle body spacer uses all factory mounting locations providing stability and a hassle-free installation. Silver Bullet Throttle Body Spacer Kit Lexus IS350 21-26 V6-3.5L

• Silver Bullet throttle body spacers create turbulence in the air flow at the point just before entry to the engine – increasing performance, as well as improving throttle response.
• Unique Serrated/Helix Entry Design Creates Turbulence and Reduces Whistle Sound
• Increases Air Speed, Improving Performance and Throttle Response
• CNC-Machined from 6061-T6 Billet Aluminum

The aFe Silver Bullet Throttle Body Spacer is designed for the 2021–2026 Lexus IS350 equipped with the 3.5L V6 engine. Part number 46-38014 uses a serrated and helix combination entry design to create controlled turbulence in the intake airflow before it enters the engine. This turbulence helps break up the incoming air and fuel mixture, supporting more complete combustion, improved throttle response, and stronger horsepower and torque potential.

Unlike helix-only designs, the serrated and helix configuration also helps reduce the intake whistle that can occur with aggressive internal airflow patterns. The spacer is CNC-machined from lightweight, high-strength 6061-T6 billet aluminum for precise fitment and a durable, clean finish. It uses the vehicle’s factory mounting locations, allowing for a stable installation without extensive modifications.

• Fitment: 2021–2026 Lexus IS350 with the 3.5L V6 engine.
• Installation: Designed for a straightforward installation using factory mounting locations.
• What's Included: One aFe Silver Bullet throttle body spacer kit.
• Important Notice: This product is not CARB approved and may not be legal for use on pollution-controlled vehicles in all applications. Check local emissions regulations before installation. California Proposition 65 warning applies.

The aFe 46-38014 Silver Bullet Throttle Body Spacer is a practical intake upgrade for Lexus IS350 owners seeking sharper throttle response and optimized airflow characteristics while maintaining a precise, factory-compatible installation approach.

Features:

• Serrated/helix entry design creates intake turbulence to support improved air and fuel mixing
• May improve horsepower, torque, throttle response, and airflow speed
• Helps reduce intake whistle compared with helix-only throttle body spacer designs
• CNC-machined from lightweight, high-strength 6061-T6 billet aluminum and uses factory mounting locations

Fitments:
2021 Lexus IS350 F Sport
2022 Lexus IS350 F Sport
2023 Lexus IS350 F Sport
2024 Lexus IS350 F Sport
2024 Lexus IS350 F Sport Design
2025 Lexus IS350 F Sport
2025 Lexus IS350 F Sport Design
2026 Lexus IS350 F Sport
2026 Lexus IS350 F Sport Design

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1