Steeda Blow Off Valve Adapter ProFlow Mustang EcoBoost 2015-2021



  • Provides Turbo Sound
  • CNC Machined
  • Easy, Bolt-On Installation
  • Made in the USA

Steeda ProFlow Blow Off Valve Adapter for 2015, 2016, 2017, 2018, 2019, 2020 and 2021 EcoBoost Mustangs.

Convert your 2.3L S550 Mustang's factory re-circulation valve into a blow off valve to achieve that coveted turbo sound! Steeda's ProFlow Blow Off Valve Adapter 555-3215 delivers an impressive sound to match the performance of your 2015-2021 EcoBoost Mustang.

Features and Benefits:
- Releases Excess Boost Pressure to the Atmosphere
- Converts Factory Re-Circulation Valve into a Blow Off Valve
- CNC Machined In-House
- Aerospace Grade 6061 Billet Aluminum
- Easy, Bolt-on installation
- No modification or tuning required
- Proudly Made in the USA!

This high-quality part was made in the USA and CNC machined in-house out of Aerospace Grade 6061 Billet Aluminum. On high boost applications, this part helps prevent turbo surge by allowing the pressure to vent to the atmosphere. With this ProFlow blow off valve adapter, you'll benefit from an easy, bolt-on installation without the need for any modifications or tuning.

California Residents: Proposition 65 Warning

Note: This item is not CARB (California Air Resource Board) exempt and is not legal for sale or use in the state of California.

Installation Difficulty


Novice skill is required for this installation.

Vehicle Fitment

This product will fit the following Mustang years:

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