How do I adjust the sound of the blow-off valve?

You can change the sound by simply twisting the adjustment ring on the valve. This lets you control the ratio of air that is recirculated versus vented to the atmosphere, allowing you to go from a quiet, recirculating sound to a loud atmospheric vent.

What issues can this blow-off valve help prevent?

This valve can help prevent common problems like backfiring and stalling that can occur when using a fixed-atmosphere blow-off valve. The adjustable venting bias allows for smoother operation with your vehicle's engine management system.

What is GFB's TMS Technology?

TMS stands for Turbo Management System. This technology is designed to ensure quick boost recovery after gear shifts and maintain optimal throttle response, contributing to a better overall driving feel.

GFB 99-00 WRX/STI TMS Respons Blow Off Valve Kit

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Specifications

Brand: Go Fast Bits
Part #: T9000
UPC: 9328022000916

GFB 99-00 WRX/STI TMS Respons Blow Off Valve Kit

Name: GFB 99-00 WRX/STI TMS Respons Blow Off Valve Kit
Brand: Go Fast Bits
SKU: go-fast-bits-gfb-99-00-wrx-sti-tms-respons-blow-off-valve-kit-t14-18538
Price: 320.85 USD
Availability: InStock

$320.85

Only 3 left in stock

Fits 1998-2002 Subaru Legacy. GFB TMS Respons Blow Off Valve Kit allows infinite adjustment of venting bias for sound and performance.

Key Features

Fits 1998-2002 Subaru Legacy, 1999-2000 Subaru Impreza, and 2004-2005 Subaru Forester.
Features a patented venting bias adjustment system that can be infinitely tuned.
Allows adjustment between full recirculation (silent) and full atmosphere (loud) venting.
Utilizes GFB's TMS Technology for rapid boost recovery and improved throttle response.
Capable of holding boost pressures up to 100psi, exceeding typical turbo output.
Helps prevent backfiring and stalling issues often associated with fixed-atmosphere BOVs.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Fits these vehicles

Subaru Forester 2004-2005
Subaru Impreza 1999-2000
Subaru Legacy 1998-2002

Product Details

The GFB TMS Respons Blow Off Valve is built with a patented venting bias adjustment system. This means you can fine-tune how much of the vented air goes back into the intake (recirculating, which is quieter) versus how much is released to the atmosphere (venting, which makes the 'pssh' sound). You can adjust this simply by twisting the adjustment ring, letting you go from a silent operation to a loud vent, or anywhere in between. This adjustability helps avoid common issues like backfiring and stalling that can happen with fixed-atmosphere BOVs, while still letting you get that desired blow-off sound.

GFB's TMS (Turbo Management System) Technology is at the core of this valve, ensuring quick boost recovery when you shift gears and maintaining good throttle response. It's also built to handle boost pressures up to 100psi, which is more than most turbos can produce, so you know it's well-built for the job. This valve is designed to fit Subaru Impreza models from 1999-2000, Subaru Legacy models from 1998-2002, and Subaru Forester models from 2004-2005.