GFB Deceptor Pro II TMS 01-07 Impreza WRX & STI 08-20 STI Only 05-07 XT Forester (Facelift Model)

GFB Deceptor Pro II TMS 01-07 Impreza WRX & STI 08-20 STI Only 05-07 XT Forester (Facelift Model)

$540.00

Tax included. Shipping calculated at checkout.

Now You Can Control The Sound Of The BOV From Inside The Cabin!

So how much more can you do with a blow-off valve? Well, the Deceptor Pro II takes the ‘Respons’ concept even further...

Adjust your BOV venting bias electronically on-the-fly

Revised porting to optimise flow and venting bias

Compact design fits in most factory valve locations

Direct bolt on for many vehicles

New bore finishing process ensures a lifetime of reliable operation

Deceptor Pro II features
Direct bolt-on for most vehicles available:

Remote proportional venting bias/volume control- from silent to loud or anywhere in between
Sleek, compact in-car BOV volume controller with backlit dial
End point adjustment to control maximum vent to atmosphere bias setting
Volume adjustment mechanism driven by a high-torque geared electric motor
Durable, low-friction gear train supported by precision sealed ball-bearing
Supplied with all parts and wiring required to have it up and running quickly and easily

Suits:

01-07 Impreza WRX & STI
08-21 STI Only
05-07 XT Forester (Facelift Model)

Install Guide

GFB Mach 2 TMS Recirculating Diverter Valve Direct Fitment 15+ WRX 14+ Forester

$219.00

Tax included. Shipping calculated at checkout.

Using GFB’s TMS technology the Mach 2 can help return the engine to peak boost up to 30% faster than a factory diverter valve when shifting gears (more information below).

Recirculation model for direct factory replacement for performance without the noise
Atmosphere venting kits to convert the recirculating valve if you want noise with your performance

Like the Respons and Deceptor Pro II, the Mach 2 is available in a range of bolt-on kits for most popular turbo models. And when we say “bolt-on”, that’s exactly what we mean! No additional adaptors, parts or vehicle modifications are required – simply remove the factory bypass valve and replace it with the Mach 2 – it’s that simple!

The Mach 2 is configured as a 100% recirculating valve (i.e. bypass, plumb back) and add on kits are also available to convert to 100% atmosphere venting.

Use the recirc model for direct factory replacement when you want the performance WITHOUT the noise! Add the conversion kit when you want some noise with your performance!

Factory bypass valves have two main shortcomings – one is that they are typically designed to start opening above a certain pressure to protect the engine, and the other is they are not optimised for throttle response. Oh, and you can’t vent them to atmosphere without stalling your engine…
The Mach 2 solves all of these issues. It can effectively hold unlimited boost (unlimited in that no turbo could ever produce enough pressure to damage it), and the TMS technology ensures maximum throttle response

GFB Blow Off Valve SV52

$399.00

Tax included. Shipping calculated at checkout.

In the race to create the most compact and highest flowing blow-off valve, GFB’s SV52 pulls ahead of the pack.

Standing only 86mm tall (including the weld-on adaptor), the SV52 is 10mm shorter than the nearest competitor, AND flows more!

Consider these questions when you’re looking for a BOV for your high-powered, forced induction engine:

Will it handle the pressure?…………………………….. YES! Is 300psi enough?

Will it flow enough?………………………………………… YES! It outflows everything else in its class!

Is it small enough to fit my engine bay?…………..YES! 10mm shorter than the nearest competitor!

Will it last?………………YES! It comes with a lifetime warranty!

Strength is important;

Realising that a high-flowing valve like this will see duty in some high-boost environments, we made sure the SV52 tops the class in that category as well, giving it an astonishing boost pressure rating of 300psi!

The SV52 also includes 2 springs PLUS a spring pre-load adjustment system so you can dial it in for optimum throttle response and boost recovery after gearshift, without resorting to the costly hit- and-miss approach of purchasing extra springs.

Suits engines with manifold vacuum ranging from 5-22inHg (17-74.5kPa, 2.5-11psi vacuum)

BODY

The SV52’s unparalleled pressure capacity starts with a monobloc body design, CNC machined from a single aluminium billet that ensures strength without adding unnecessary bulk.

PISTON

The anodized piston bore creates an extremely hard and low-friction surface on which the single piece aluminum 52.5mm piston glides, and will continue to do so over countless cycles. It features an arrangement of Viton o-ring seals unique to GFB.

DESIGN

Why do we use a piston instead of the more common diaphragm design?

Strength and reliability is the primary factor, something that a diaphragm simply cannot match in a high-boost BOV environment. Diaphragms have their place (we use them in our wastegates), as they offer low friction and good sealing capability. However, a rolling diaphragm is only designed to receive a net pressure on one side, which essentially “inflates” it against the walls of the chamber in which it resides, exactly how it is used in a wastegate.

However, a BOV is exposed to frequent pressure reversals – every time you accelerate and lift off.

For a diaphragm, this means it is repeatedly collapsing on itself under boost, then inflating under vacuum. Eventually, this leads to diaphragm failure. A piston on the other hand is immune to this issue, and will continue to operate under the most extreme pressure, temperature, and cyclic conditions.

The unique mounting method of the SV52 is one of the ways we’ve been able to save unnecessary bulk.

By eliminating the v-band style mount, the piston and its venting ports can sit much lower, which reduces the overall height to a number others can’t match.

This is a universal part

GFB Respons 15+ WRX 13-18 Forester

$397.00

Tax included. Shipping calculated at checkout.

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:

Adjust how loud the blow-off sound is. Recirculate all of the air for silent factory operation, vent it all to atmosphere for maximum noise, or set it ANYWHERE in between to suit your preference.

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 Respons isn’t just a noise-maker. It also;

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

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.

GFB Respons 08-14 WRX 04-09 Liberty 09-12 Forester

GFB Respons 08-14 WRX 04-09 Liberty 09-12 Forester

$397.00

Tax included. Shipping calculated at checkout.

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:

Adjust how loud the blow-off sound is. Recirculate all of the air for silent factory operation, vent it all to atmosphere for maximum noise, or set it ANYWHERE in between to suit your preference.

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 Respons isn’t just a noise-maker. It also;

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

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.

GFB Respons 01-07 WRX 02+ STI 03-07 Forester

GFB Respons 01-07 WRX 02+ STI 03-07 Forester

$397.00

Tax included. Shipping calculated at checkout.

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:

Adjust how loud the blow-off sound is. Recirculate all of the air for silent factory operation, vent it all to atmosphere for maximum noise, or set it ANYWHERE in between to suit your preference.

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 Respons isn’t just a noise-maker. It also;

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

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.

GFB Respons 99-00 WRX/STI 98-04 Forester 98-03 Liberty

GFB Respons 99-00 WRX/STI 98-04 Forester 98-03 Liberty

$397.00

Tax included. Shipping calculated at checkout.

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:

Adjust how loud the blow-off sound is. Recirculate all of the air for silent factory operation, vent it all to atmosphere for maximum noise, or set it ANYWHERE in between to suit your preference.

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 Respons isn’t just a noise-maker. It also;

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

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.

GFB Respons Blow Off Valve 1994-98 Impreza WRX & STI

GFB Respons Blow Off Valve 1994-98 Impreza WRX & STI

$397.00

Tax included. Shipping calculated at checkout.

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:

Adjust how loud the blow-off sound is. Recirculate all of the air for silent factory operation, vent it all to atmosphere for maximum noise, or set it ANYWHERE in between to suit your preference.

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 Respons isn’t just a noise-maker. It also;

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

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.

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