Go Fast Bits T9003 Respons BOV for 02-14 Subaru WRX STI/WRX/FXT

Vehicle Fitment

• 2001-2007 Subaru Impreza WRX (GD/GG, EJ20/EJ25 turbo, manual/automatic AWD)
• 2002-2014 Subaru Impreza WRX STI / Subaru WRX STI (GD/GG/GR/GV/VA, EJ20/EJ25 turbo, AWD)
• 2005-2008 Subaru Forester XT (SG, EJ25 turbo, AWD)

Features

• Direct-fit Respons TMS hybrid blow-off/diverter valve for select Subaru turbo applications
• Patented adjustable venting bias system lets you tune between full recirculation and atmospheric venting
• Designed to deliver blow-off sound without the common drivability issues associated with fully atmospheric valves on MAF-based systems
• TMS advantage helps improve boost holding and throttle response over the factory bypass valve
• Application-specific mounting for Subaru WRX, STI, and Forester XT factory locations
• Suitable for high-boost turbocharged use with a rated operating range up to 100 psi
• Adjustable response and sound level to suit street or performance driving
• Machined aluminum valve body for durability and repeated heat-cycle resistance
• Supplied with model-specific hardware for installation
• Can help reduce boost leakage associated with aging OEM bypass valves

Specifications

• Part Number: T9003
• Brand: Go Fast Bits
• Product Line: Respons TMS Direct Fit
• Product Type: Hybrid blow-off valve / diverter valve
• Mounting Style: OEM direct-fit
• Material: Aluminum
• Finish/Color: Black
• Adjustment: Adjustable venting bias / sound control
• Boost Range: 0-100 psi
• Fitment Position: Factory bypass valve location
• Drivetrain Compatibility: AWD
• Platform Coverage: GD/GG WRX, GD/GG/GR/GV/VA STI, SG Forester XT

Included Components

• 1x GFB Respons TMS blow-off valve
• 1x Orange silicone 30 x 2 O-ring
• 1x 5mm hex key
• 2x M8 x 20 countersunk socket mounting bolts

Product Description

The Go Fast Bits T9003 Respons TMS is a direct-fit hybrid blow-off valve engineered for selected Subaru turbo models using the factory bypass valve location. It combines GFB's patented adjustable venting bias system with a direct-fit body, allowing you to vary the discharge from fully recirculated to increasingly atmospheric. This gives you control over both sound and response while helping avoid the stalling, rich running, and backfiring issues that can happen with fully atmospheric valves on airflow-metered Subaru applications.

This valve is a popular upgrade for owners of the 2001-2007 WRX, 2002-2014 STI, and 2005-2008 Forester XT who want better boost retention, faster valve response, and adjustable blow-off sound in one package. It is intended for AWD turbo Subaru platforms listed above and installs in the OEM bypass valve position using the supplied hardware. This is not a lift or lowering product, so no front/rear height change applies. Fitment is confirmed through 2014 for STI and through 2008 for Forester XT based on GFB and trusted reseller references. 2015-2025 WRX/STI/Forester coverage is unconfirmed at time of listing.