Product Details: Basic in design, but big on performance! Sporting the same quality internal components and unique features found in all GFB valves, the Basic is actually the highest flowing valve in the universal range. The 5-hole pattern ensures a huge venting area and free-flowing air path.

Other valves on the market may look like the Basic, but rest assured, size for size the Basic will out-flow most of them by up to 40%. Because of the free-flowing characteristics, this valve is not as loud as the Mach 1 or Bovus Maximus. This does however, make it a good choice for big horsepower engines.

Fits:

Ford Falcon XR6 Turbo (BA model)
    -Required Adaptor: 5025
*when installing a GFB valve, it must be installed in the REVERSE direction compared to the factory one. This is essential for the valve to operate properly. Incorrect orientation of a GFB valve will not allow the piston to open*

Ford Laser TX3 Turbo 4WD KE - KHII (1987 – 1993)
    -Required adaptor: 5020
    -Direct Bolt On

Holden VL Commodore Turbo (1986 - 1988)
    *Since there is no factory fitted bypass valve, installation of a blow-off valve is a custom job, requiring a short length of steel pipe to be welded onto the inlet piping between the turbo and the throttle.*

Mazda RX-7 S4 & 5 (1986 – 1991)
    *Custom Installation: usually involve fabricating a replacement turbo-intercooler up-pipe with a 25.4  mm pipe welded on to mount the GFB valve. When using a GFB BOV on an RX-7 with a front mounted intercooler, the BOV should be custom installed by welding a short section of pipe onto the intercooler plumbing*

 -When using the factory engine management computer, The GFB Plumback and Hybrid are recommended since they can be used successfully on air-flow metered vehicles.

Mitsubishi Starion Turbo JA - JD (1982 - 1987)
    *Because there was no factory BOV, fitting one will require welding a short length of steel pipe somewhere between the turbo and the throttle, on a non-intercooled Starion, or between the intercooler and the throttle on a JD Starion. This kind of work can be easily and economically carried out by a workshop that's familiar with modified cars.*

Mitsubishi Cordia GSR Turbo AA - AC (1984 – 89)
    *The Cordia wasn't fitted with a blow-off valve as standard so fitting a GFB BOV can improve after-gear-change throttle response when driving hard. It will also prevent compressor surge and of course provide the characteristic ‘PSSH' noise that turbo cars like the Cordia are all about! Fitting a GFB blow-off valve to your Cordia requires that a steel pipe be welded onto the intake plumbing between the turbo compressor outlet and the throttle, after the intercooler if one has been fitted. This kind of job can easily and economically be carried out by a performance oriented workshop.*

Mitsubishi CC Lancer GSR (1992 - 1996)
    -Direct Bolt on
*Lancer GSRs use a factory valve which is designed to leak at boost levels higher than factory, so it is worthwhile replacing if you plan to increase boost levels. GSRs have no problem with vent-to-atmosphere blow-off valves*

Mitsubishi Lancer EVO
    -Direct Bolt on
*Most early EVO models have no problems with atmosphere-venting, however the later EVO VI-VIII, in particular the US models, generally prefer to recirculate at least some of the vented air. For these models, it is best to use the Plumb Back, Hybrid, Stealth FX or Deceptor Pro*

Mitsubishi Galant VR-4 (1990 - 1993)
    -Required Adaptor: 5102
    -Direct Bolt On

Nissan 200SX SR20DET S14 – 15 (1994 – 2003)
    -Required Adaptor: 5109
    -Direct Bolt On
*The standard turbocharger on the 200SX (like the Skyline turbos) is prone to low rpm compressor surge. By replacing the factory BOV with a GFB unit, this tendency can be reduced, although compressor surge can still occur. However, as long as it only occurs at low rpm and boost levels then it isn't likely to cause turbo damage*

Nissan S13 Silvia & 180SX CA18DET
    *To fit a GFB blow-off valve to your Silvia or 180', weld a short section of steel pipe onto the intake between the intercooler and the throttle, onto which the BOV will secure*

Nissan S13 Silvia & 180SX SR20DET
    -Direct Bolt On

Nissan Skyline GTS-t R32
    -Required Adaptor: 5102
    -Direct Bolt On

Nissan Skyline GTS-t R33 and GT-T R34
    -Required Adaptor: 5104
    -Direct Bolt On

Nissan Skyline GT-R R32 (1989 – 1993)
    -Required Adaptor: 5104
    -Direct Bolt On
*You will need two of these!*

Nissan Pulsar GTi-R N14 (1990 – 1994)
    -Direct Bolt On
*Important: the GTi-R's quad throttle bodies mean that the engine vacuum under idle and cruise conditions is less than almost any other car – proof that they really do reduce intake flow restriction! However, this means that to work sucessfully, any GFB BOV fitted to a GTi-R must first be fitted with a lighter spring – the one usually fitted to the GFB plumback BOV*

N12 Pulsar ET (1984 – 1987)
   *Fitting a GFB BOV to your ET is simple, just weld a short section of steel pipe (aluminium and stainless steel also available) to the intake system somewhere between the turbo and the throttle, and after the intercooler if there's one fitted. The GFB BOV then secures onto this pipe. Connect up a vacuum line to the BOVs vacuum nipple and you're done!*

Nissan Z32 300ZX Twin-turbo
    -Direct Bolt On

Subaru WRX MY94-96
    -Required Adaptor: 5020 and 5520
    -Direct Bolt On
 *This particular model has a very small factory valve, using 19mm internal diameter hoses. The metal elbow fitting that feeds the factory BOV is even smaller through the bore, about 15mm. It is quite straightforward installing an atmosphere-venting valve, as the plumb back hose is simply plugged (using the 20mm 5520 plug) and the valve is fastened to the factory hose*

MY97-98 WRX and Version 3-4 STi
    -Direct Bolt On
*Blow-off valve installation on this model is very easy, the factory valve is hose mounted and secured with hose clamps. GFB units will fit straight back into the factory position*

MY99-00 WRX and Version 5-6 STi
    -Required Adaptor: 5101
    -Direct Bolt On
*When installing valves with plumb back fittings on this model, it is a good idea to replace the factory spring-type hose clamp on the plumb back hose with a more substantial band-type*

MY01-02 (MY02-03 in the U.S.) WRX and STi ("bugeye")
    -Required Adaptor: 5108
    -Direct Bolt On
*The factory bypass valve is actually designed to leak at elevated boost pressure levels. This is bad news if you are planning on increasing the boost level. Despite the stronger spring in the later model valve, the relocation of the diaphragm vent hole (to receive boost pressure rather than atmospheric) means that it will begin to open at about 15psi. There are good throttle response improvements to be had by replacing this valve*

MY03-current (MY04-current in the U.S.) WRX and STi
    -Required Adaptor: 5108
    -Direct Bolt On
*The factory bypass valve is actually designed to leak at elevated boost pressure levels. This is bad news if you are planning on increasing the boost level. Despite the stronger spring in the later model valve, the relocation of the diaphragm vent hole (to receive boost pressure rather than atmospheric) means that it will begin to open at about 15psi. There are good throttle response improvements to be had by replacing this valve*

Subaru Forester GT (MY98 - 00)
    -Required Adaptor: 5101
*Fitting a GFB blow-off valve to your Forester is simple. Using a GFB Forester GT/MY99-00 WRX flange mount adaptor, which bolts on in the factory BOV position on the intercooler*

Subaru Forester GT (MY01 - 02)
    -Required Adaptor: 5106
    -Direct Bolt On
*Fitting a GFB blow-off valve to your MY01 - 02 Forester GT is simple. Using a GFB Forester GT (MY01-02) flange mount base adaptor, which bolts on in the factory BOV position on the intercooler*

Subaru Forester XT (MY03 - 04)
    -Required Adaptor: 5107
    -Direct Bolt On
*Fitting a GFB blow-off valve to your Forester XT requires the use of a GFB Forester XT flange adaptor*

Subaru Forester XT (MY05 onwards)
    -Required Adaptor: 5108
    -Direct Bolt On
*The factory BOV on 2005 onwards Forester XTs is very similar to the one fitted to MY01 - 02 WRXs. For this reason the WRX Hybrid, WRX Stealth FX and WRX Deceptor Pro will bolt-on without the need for any adaptors or modifications. The vent-to-atmosphere blow-off valves; Mach 1, Basic and Bovus Maximus; will all bolt-on using the 5108 adaptor*

Toyota Celica GT4 ST205 (1994 – 1995)
    *fits in place of the factory unit requiring only minor modifications to the factory rubber hoses or a replacement hose. While it won't give you a measurable power increase, it will give you an improvement in throttle response that you can feel*

    *All of the GFB BOVs fit in place of the factory unit requiring only minor modifications to the factory rubber hoses or a replacement hose.*

Toyota Supra JZA80 2JZGTE
    *will require a custom installation using additional rubber hoses (available from any auto parts store)*

Additional Notes:

*Blow-off valves 1001 - 1005, 1008 and 1025 can be custom fitted by welding a short length of 1" steel pipe onto the inlet plumbing.

*A short section of weld-on pipe is supplied with BOVs 1001 - 5, and is available as optional part no. 5601 for others*