Respons TMS T9000 (WRX/STI MY99-00/Liberty MY98-03/Forester MY98-02)

On the surface, it may look like just another dual-port blow-off valve, but the response is actually much more than that. Featuring GFB‰۪s patented venting bias adjustment system, the Respons allows you to precisely control how much air vents from each of the two outlets.

Why is this so important? Two key reasons:

1. Adjust how loud the blow-off sound is. Recirculate all of the air for silent factory operation, vent it all to the atmosphere for maximum noise, or set it ANYWHERE in between to suit your preference.
2. Get a blow-off sound WITHOUT causing stalling, backfiring, or any other BOV-related issues, even on a car with a sensitive airflow meter (MAF).

Hold on, it gets better. The response isn‰۪t just a noise-maker. It also;

• Offers better throttle response
• Faster boost recovery on gearshift
• Unlimited boost-holding!

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For example, using GFB‰۪s TMS (Turbo Management System) principle, tests show that the Respons can return the engine to peak boost up to 30% faster than a factory diverter valve when shifting gears (more information below)

(*Chart shows comparative manifold boost pressure rise during 1st to 2nd gear shift as tested on a CA18DET with a T28 turbo. GFB TMS improvement is seen as a 30% faster return to peak boost, during which time up to40% more boost is available)

OUT OF STOCK? No worries, a backorder is available.
Simply send us a message on the inquiry screen "here" and we can manually process your back order and supply time frames.

PLEASE NOTE: ALL PARTS ARE SUBJECT TO AVAILABILITY unless stock level indicated on product page.