Turbo XS WS-HYB Hybrid Blow Off Valve for 2002-2007 Subaru WRX/STI

Vehicle Fitment

• 2002-2007 Subaru Impreza WRX / WRX STI (all trims including WRX, WRX Limited, WRX STI, WRX STI Limited, WRX TR)
• Note: Some retailers list Forester XT 2004-2008 compatibility; confirm specific model application before installation. 

Features

• Hybrid blow-off valve design (50/50 recirculation to atmosphere)
• Improved boost relief over factory bypass valve
• CNC machined aluminum construction for strength
• Black anodized finish for durability
• Enhances throttle response and turbo efficiency
• Provides more pronounced sound than stock recirculation valve
• Direct replacement for OEM bypass valve
• Designed to handle increased boost pressures

Specifications

• Part Number: WS-HYB
• Type: Hybrid Blow Off Valve / 50/50 Bypass Valve
• Material: CNC machined aluminum
• Finish: Anodized
• Fitment: Direct OEM replacement on specified Subaru turbocharged models
• Boost Handling: Improved over stock valve (user dependent on tune/mods)
• Installation: Replaces stock bypass valve with existing flange
• CARB: Not CARB legal (not for California sale) per some retailers.

Included Components

• 1x Turbo XS WS-HYB Hybrid Blow Off Valve
• 1x Mounting flange / adapter (as required for fitment)
• 1x Gasket / seal kit
• 1x Installation hardware set

Product Description

The Turbo XS WS-HYB Hybrid Blow Off Valve is an upgraded performance valve designed for turbocharged Subaru Impreza WRX and WRX STI models from 2002 through 2007. This hybrid design provides a balanced combination of recirculation and atmospheric venting, offering better throttle response and a more engaging turbo sound compared with the factory bypass valve. The valve's CNC-machined aluminum body and anodized finish deliver durability and long-term reliability under boosted conditions.

Installation on compatible Subaru vehicles is a direct replacement for the OEM bypass valve using existing mounting points, making it popular for enthusiasts seeking improved performance without extensive modification. While performance gains depend on supporting modifications and proper tuning, the WS-HYB valve helps to improve turbocharger efficiency and air-pressure management during throttle lift. Before installation, verify vehicle compatibility and local emissions regulations, as this part is not CARB legal in all regions.