GFB T9000 User Manual

Respons TMS Valve

Installation Instructions

Part # T9000

P.O. Box 1017 Riverwood NSW 2210

Ph: [phone] Fax: [phone]

Website: www.gfb.com.au Email: [e-mail]

Installation Instructions for GFB Respons (part # T9000)

Applicable vehicles:

• WRX/STi MY99-00

• B4 Legacy/Liberty MY98-02

• Forester GT/XT MY98-04

1) Using a pair of pliers, open the hose clamp

that holds the large rubber recirc hose onto
the factory bypass valve and pull the hose
free.

2) Remove the two bolts holding the factory

bypass valve to the intercooler, taking care
not to drop them or the gasket between the
intercooler and the valve (it’s tricky to
retrieve them if they fall!).

3) Pull the vacuum hose from the factory valve, then remove the valve completely from the car.

4) Replace the two mounting bolts and gasket back onto the intercooler, screwing the bolts in

about 3 turns. The GFB Respons valve can be mounted with the screws partially in place.
This makes it easier to install, and reduces the chance of dropping the screws or the gasket.

5) Slot the Respons onto the two partially screwed-in bolts, then tighten the bolts completely.

Replace the recirc hose and hose clamp, and the vacuum hose.

Spring Adjustment

Contrary to popular belief, the spring pre-load DOES NOT need to be adjusted to suit different
boost levels. The valve will stay shut under full throttle conditions regardless of boost pressure or
spring pre-load.

Rather, the spring pre-load affects how easily the valve opens
when you lift the throttle, and how long it stays open when it
vents. Adjusting the spring is a simple matter of ensuring the
valve opens enough to release the air, but not long enough to
cause idling problems. The guide below will walk you
through the steps involved.

The screw in the centre of the head is the spring adjuster
(shown opposite). Use the supplied 5mm hex key for this
screw.

The softest spring setting is achieved when the top of the
adjustment screw is 3mm above the head of the valve. Do not
set the screw more than 3mm above the head.