Subaru Blow Off Valve (BOV) Sound Plate Adapter | ADD W1
Upgrade your turbocharged Subaru with the ADD W1 Blow Off Valve (BOV) Sound Plate Adapter. Designed to install between the factory electronic bypass valve and the turbocharger, this adapter vents excess boost pressure to the atmosphere, producing the signature "Pshhhh" blow off valve sound while retaining the OEM electronic bypass valve.
The ADD W1 Sound Plate Adapter includes three interchangeable sound adjustment screws, allowing you to customize the amount of vented air and fine-tune the blow off valve sound to match your driving style.
Precision CNC-machined from lightweight 6061 billet aluminum and finished with a durable black anodized coating, this adapter provides exceptional strength, corrosion resistance, and an OEM-quality fit. Installation is completely bolt-on with no cutting or permanent modifications required.
Vehicle Fitment
Subaru
WRX
- 2022–2026 2.4L Turbo
Ascent
- 2019–2026 2.4L Turbo
Legacy XT
- 2021–2026 2.4L Turbo
Outback XT
- 2020–2026 2.4L Turbo
Features
- Produces the signature atmospheric "Pshhhh" Blow Off Valve sound
- Includes 3 interchangeable sound adjustment screws for customizable sound levels
- Works with the factory electronic bypass valve
- CNC-machined from premium 6061 billet aluminum
- Durable black anodized finish for corrosion resistance
- Direct bolt-on installation
- No cutting or permanent modifications required
- OEM-quality fit and finish
- Limited Lifetime Warranty
Kit Includes
- (1) ADD W1 Blow Off Valve (BOV) Sound Plate Adapter
- (1) O-Ring Seal
- (1) Worm Gear Clamp
- (3) Sound Adjustment Screws
- All required installation hardware
- Simple bolt-on installation
Why Choose ADD W1?
The ADD W1 Blow Off Valve Sound Plate Adapter is an easy upgrade for Subaru owners looking to increase turbo sound without replacing the factory bypass valve. The included three sound adjustment screws let you fine-tune the venting level and achieve the blow off sound that best matches your preference while maintaining OEM drivability and reliability.
Important Note
Blow Off Valve (BOV) NOT Included.
This product is a Blow Off Valve Sound Plate Adapter that installs between the factory electronic bypass valve and the turbocharger. It is designed to enhance the factory blow off valve sound while retaining the OEM electronic bypass valve.