GFB Mach 2 T9100 Diverter Valve/ Blow Off Valve

Comes as 100% Recir but can be configured to a 100% Vented BOV at an additional cost (Pease see Drop Down Menu for this option)

To Suit:

Subaru Forester GT SF EJ20T 98-02

Subaru Impreza GT GC/GF EJ20T 98-00

Subaru Impreza STi EJ20T GC8-GF8 99-00

Subaru Impreza WRX EJ20T GC8-GF8 99-00

Subaru Legacy BE-BH EJ20T 98-03

Subaru Forester XT SG Series 1 EJ20T/EJ25T 02-08

Please use drop down menu to select the correct configuration for your application

GFB Mach 2 T9101 Diverter Valve/ Blow Off Valve

Comes as 100% Recir but can be configured to a 100% Vented BOV at an additional cost (Pease see Drop Down Menu for this option)

To Suit:

Subaru Forester XT SH EJ25T 08-on

Subaru Impreza STi GR EJ25T 08-11

Subaru Impreza WRX GE-GH EJ25T 08-11

Subaru Legacy BL-BP EJ20T 03-06

Subaru Liberty BL-BP EJ25T 06-09

Subaru Liberty BL-BP EJ20T 03-06

Please use drop down menu to select the correct configuration for your application

GFB Mach 2 T9102 Diverter Valve/ Blow Off Valve

Comes as 100% Recir but can be configured to a 100% Vented BOV at an additional cost (Pease see Drop Down Menu for this option)

To Suit:

Mazda 3 MPS BK MZR L3-VDT inc Mazdaspeed 06-09

Mazda 3 MPS BL MZR L3-VDT inc Mazdaspeed 09-13

Mazda 6 MPS GG MZR L3-VDT inc Mazdaspeed 05-on

Mazda CX7 All ER L3-VDT 06-on

Mazda MPV

Mitsubishi Eclipse 1G 4G63T D2_A 90-94

Mitsubishi Galant VR4 E38A-E39A 4G63T HH/HG 89-93

Nissan Skyline R31 RB20DET 85-90

Nissan Skyline R32 RB20DET 89-93

Nissan Skyline R33 RB20DET 93-98

Nissan Skyline R33 RB25DET 93-98

Nissan Skyline R34 RB25DET 98-06

Please use drop down menu to select the correct configuration for your application

GFB Mach 2 T9103 Diverter Valve/ Blow Off Valve

Comes as 100% Recir but can be configured to a 100% Vented BOV at an additional cost (Pease see Drop Down Menu for this option)

To Suit:

Subaru Impreza STi GDB-GGB EJ20T 02-07

Subaru Impreza STi GDB-GGB EJ25T 02-07

Subaru Impreza STi GR EJ25T 08-11

Subaru Impreza STi EJ25T 14-on

Subaru Impreza WRX GDA-GGA EJ20T 00-07

Subaru Impreza WRX GDA-GGA EJ25T 06-07

Subaru Forester XT SG Series 2 EJ25T 05-08

GFB Mach 2 T9104 Diverter Valve/ Blow Off Valve

Comes as 100% Recir but can be configured to a 100% Vented BOV at an additional cost (Pease see Drop Down Menu for this option)

To Suit:

Nissan 200SX S14-S15 SR20DET 94-03

Nissan Silvia S14 SR20DET 93-99

Nissan Silvia S15 SR20DET 00-03

GFB Mach 2 T9105 Diverter Valve/ Blow Off Valve (2 Valves Included)

Comes as 100% Recir but can be configured to a 100% Vented BOV at an additional cost (Pease see Drop Down Menu for this option)

To Suit

Nissan Skyline R35 GT-R VR38DETT 09-on

GFB Mach 2 T9107 Diverter Valve/ Blow Off Valve

Comes as 100% Recirc but can be configured to a 100% Vented BOV at an additional cost (Pease see Drop Down Menu for this option)

To Suit:

Subaru Impreza WRX FA20DIT 14-on

Subaru Forester XT SJ FA20T 13-on

Please use drop down menu to select the correct configuration for your application

GFB T9112 Valves (2 Included) 

To Suit:

KIA Stinger 3.3T-GDI 06/17-on

The T9112 Mach 2 kit is a direct bolt-on for the Kia Stinger V6 twin turbo. No additional adaptors, parts or vehicle modifications are required – simply remove the factory bypass valves and replace them with the Mach 2 valves – it’s that simple!

Factory bypass valves have two main shortcomings – one is that they are typically designed to blow open above a certain boost pressure to protect the engine, and the other is they are not optimised for throttle response.

GFB’s range of direct bolt-on blow off valves give YOUR Kia Stinger the sound you want, and the performance to go with it! Stinger kits available, part numbers T9112, T9212, T9012, T9013

GFB Mach 2 T9120 Diverter Valve/ Blow Off Valve

Comes as 100% Recirc but can be configured to a 100% Vented BOV at an additional cost (Pease see Drop Down Menu for this option)

To Suit:

Ford Laser KC-KE B6T 87-90

Ford Laser KF-KH BPT 90-93

Mazda MX-5 NB BP-4W inc Mazdaspeed 04-05

Subaru Impreza GT GC-GF EJ20T 94-98

Subaru Impreza WRX GC8-GF8 EJ20T 94-96

Subaru Impreza STi GC8B-GC8C 93-96

Toyota Supra JZA80 2JZ-GTE 93-02

GFB Mach 2 T9125 Diverter Valve/ Blow Off Valve

Comes as 100% Recirc but can be configured to a 100% Vented BOV at no extra cost (Pease see Drop Down Menu for this option)

To Suit:

Audi/VW Running the Factory Bosch 25mm Diverter Valve

Ford Running the Factory Bosch 25mm Diverter Valve

Universal for Intercooler Piping or Silicone Tee with 25mm Port

Please use drop down menu to select the correct configuration for your application

GFB Mach 2 T9125A 100% Venting Blow Off Valve (25mm Inlet)

Comes as 100% Vented (comes with the Trumpet)

To Suit:

25mm Hose 

Universal for Intercooler Piping or Silicone Tee with 25mm Port

Please use drop down menu to select the correct configuration for your application

This is sold as a universal standard venting BOV to mount on intercooler piping with either a 1" (25mm) OD flange or can be clamped on with a 1.25" (33mm) ID silicone hose

GFB Mach 2 T9133 Diverter Valve/ Blow Off Valve

Comes as 100% Recir but can be configured to a 100% Vented BOV at no extra cost (Pease see Drop Down Menu for this option)

To Suit:

Subaru Legacy GT BM.BR MY10-14

Mitsubishi Lancer EVO I-III CD9A-CE9A 4G63T 92-96

Mitsubishi Lancer EVO IV-IX CN9A-CT9A 4G63T 96-07

Mitsubishi Lancer EVO X inc Ralliart CZ4A 4B11T 07-on

Mitsubishi Lancer GSR CD9A 4G93T 92-96

Mitsubishi Legnum VR-4 EC5A-EC5W 6A13TT 96-02

Dodge Stealth Z1_A 92-00

Mitsubishi 3000GT VR-4 Z16A 6G72TT 92-99

Mitsubishi Colt Ralliart 4G15T RG 06-on

Mitsubishi Eclipse 2G D3_A 95-99

Mitsubishi Galant VR-4 E84A 6A12TT HJ 92-96

Mitsubishi GTO 6G72TT Z1_A 89-00

This is sold as a universal standard venting BOV to mount on intercooler piping with either a 1" (25mm) OD flange or can be clamped on with a 1.40" (35mm) ID silicone hose

GFB Mach 2 T9135 Diverter Valve/ Blow Off Valve

Comes as 100% Recirc but can be configured to a 100% Vented BOV at no extra cost (Pease see Drop Down Menu for this option)

To Suit:

Subaru Impreza WRX GC8-GF8 EJ20T 96-97

Subaru Impreza STi GC8 EJ20T 94-97

Skoda Octavia MK1 1U 96-06

Mitsubishi Cordia AA-AC 4G62T 83-89

Mitsubishi Starion JA-JD 4G63T 82-88

Nissan 180SX S13 CA18DET 89-94

Nissan Silvia S13 CA18DET 89-94

Nissan Silvia S13 SR20DET 89-94

Nissan 300ZX Z32 VG30DETT 89-97

Mazda 626 GC FET 86-87

Mazda 626 GD F2 87-91

Mazda MX6 GD F2 87-91

Toyota Celica GT-Four ST165 3S-GTE 86-89

Toyota Celica GT-Four ST185 3S-GTE 90-93

Toyota Celica GT-Four ST205 3S-GTE 94-99

Holden Commodore VL RB30ET 86-88

The ability to change the sound of a blow-off valve is increasingly becoming an important issue with buyers, who want to sound different from everyone else.

GFB have released the Whistling Trumpet (part # 5701), which emitted a piercing screech when driving aggressively. Unfortunately for a number of GFB owners, the 5701 trumpet only worked with some valve types.

For the owners of all other types of GFB valves, GFB have now released the 5702 – a modified version of the Whistling Trumpet that is designed to work on low boost applications where the 5701 doesn’t cut it. 

The 5702 can be used in place of the standard trumpet on all GFB valves, and will make the whistling sound more readily than the 5701 (high boost and RPM is required to get the whistle from a 5701), and at a slightly higher pitch.  Like the 5701 however, it is necessary to run the valve so that all (or most) of the air vents through the trumpet – Respons valves will typically not generate the velocity required to whistle when set to 50/50 venting.

If you have any questions about these CLICK HERE to contact us.

19mm (3/4") ID hose

25mm (1") ID hose

30mm (1-1/8") ID hose

33mm (1-1/4") ID hose

The 5350 GFB to HKS adaptor allows GFB's diverter/blow off valves to be mounted onto an HKS style mounting flange.

To suit the following GFB BOV's

Respons : T9007, T9020, T9025, T9033, T9035
Mach 2 : T9107, T9120, T9125, T9133, T9135

Hybrid : T9207, T9220, T9225, T9233, T9235
Deceptor Pro : T9507, T9520, T9525, T9533, T9535