aFe Sprint Booster V3 Power Converter Subaru Ascent 19-26 / Outback 08-25 / Crosstrek 13-23 / Legacy 08-25 / | 77-16801

Product Fitment:

2019-2026 Subaru Ascent

2013-2023 Subaru Crosstrek

2008-2025 Subaru Legacy

2008-2025 Subaru Outback

Modern drive-by-wire throttle systems prioritize efficiency—but often at the cost of responsiveness. The Sprint Booster Electronic Throttle Controller is designed to eliminate throttle lag found in ETC (Electronic Throttle Control) vehicles, delivering sharper acceleration, improved drivability, and instant pedal response exactly when you need it.

By recalibrating the throttle signal between the accelerator pedal and the ECU, Sprint Booster removes the factory delay that causes sluggish launches, hesitant uphill starts, delayed gear changes, and muted passing power. The result is crisp, on-demand acceleration without altering engine mapping or affecting other vehicle systems.

Plug-and-Play Installation

Sprint Booster installs directly into the factory accelerator pedal connector behind the pedal assembly. No cutting, splicing, or ECU tuning required.

• 100% reversible

• No interference with ABS, traction control, or fuel injection

• Ultra-compact unit mounts cleanly inside the cabin

Three Selectable Acceleration Modes

Switch modes instantly using the onboard control button:

• Factory Mode (LED Off): Stock throttle response

• Sport Mode (Green LED): Up to 30% quicker throttle response

• Race Mode (Red LED): Up to 60% quicker throttle response

36 Total Acceleration Programs

Each mode includes nine adjustable sensitivity levels:

• Sport 1–9

• Race 1–9

• Fine-tune throttle behavior to match your driving style

• Choose aggressive launch response or smooth daily drivability

Automatic & Manual Transmission Compatible

Sprint Booster automatically adapts to your transmission type:

• Dedicated tuning for automatic or manual transmissions

• Select transmission type via integrated slide switch

• 18 programs for manual + 18 programs for automatic vehicles

Valet Mode & Pedal Lock Security

• Valet Mode: Limits acceleration by 55%, 65%, or 75%

• Pedal Lock Mode: Disables throttle input entirely

• Both protected by a 3-digit PIN for added security

• Ideal for valet parking or theft deterrence

Improved Daily Drivability

In addition to faster throttle response:

• Smoother downshifts

• Improved automatic transmission behavior

• Safer overtaking and merging

Key Features

• Eliminates throttle lag on drive-by-wire vehicles

• 3 driving modes with 36 total acceleration programs

• Works with automatic and manual transmissions

• Plug-and-play installation with no permanent modifications

• Valet mode and pedal lock for security

• Compact, cabin-mounted controller

Emissions Disclaimer

This product is not CARB exempt and is not legal for sale or use in California or on vehicles registered with the California DMV.