Vehicle Fitment

  • 2015–2021 Subaru WRX (All trims AWD; FA20 2.0L turbo)

Features

  • Race‑Spec rebuildable bypass valve engineered for high‑boost performance
  • Servicable diaphragm and spring assembly for tuning and long service life
  • Improved boost control and responsiveness in aggressive driving
  • Optimized internal flow for better turbo surge control under load
  • Red anodized finish for corrosion resistance and visual appeal
  • Direct bolt‑on replacement for factory bypass valve
  • Includes upgraded internal components specifically for performance use
  • Compatible with stock and many aftermarket intake piping systems

Specifications

  • Part Number: W15‑XS‑RBV‑RS
  • Type: Rebuildable bypass valve – Race Spec
  • Fitment: 2015–2021 Subaru WRX (FA20 turbo engine)
  • Material: Red anodized aluminum housing and internals
  • Serviceability: Fully rebuildable diaphragm and spring assembly
  • Installation: Direct bolt‑on replacement bypass valve
  • Compatibility: Works with stock intake piping and many aftermarket setups
  • Application: Street, track, and high‑performance builds

Included Components

  • 1x TurboXS Race Spec rebuildable bypass valve assembly
  • 1x Rebuild kit components (diaphragm, high‑performance spring, seals)
  • 1x Vacuum hose and fittings
  • Installation hardware

Product Description

The TurboXS W15‑XS‑RBV‑RS Race Spec Rebuildable Bypass Valve is a high‑performance upgrade designed specifically for 2015–2021 Subaru WRX models equipped with the FA20 turbocharged engine. This Race Spec unit features a rebuildable diaphragm and spring assembly that allows enthusiasts and tuners to service and tune the valve as power levels increase. Compared to the standard factory bypass valve, the RBV‑RS offers improved boost control, reduced turbo surge, and more consistent performance under aggressive driving conditions.

Constructed from durable red anodized aluminum, the W15‑XS‑RBV‑RS bolts directly into place as a direct replacement for the factory bypass valve. Its internal flow characteristics are optimized for high‑boost and performance applications, making it an ideal choice for street and track builds alike. The race‑tuned internal components and included rebuild kit allow owners to service or adjust performance over time without replacing the entire assembly, giving you long‑term flexibility and reliability as your build evolves.



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