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  • GFB 3-Piece Lightweight Pulley Kit - BRZ/86/FR-S-Pulleys-Speed Science

    GFB 3-Piece Lightweight Pulley Kit - BRZ/86/FR-S

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    $429.00

    Like all GFB lightweight pulleys, these begin life as a single 6061-T6 aluminium alloy billet, which is then precision CNC machined to exacting to...

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    $429.00
  • GFB 3-Piece Underdrive Pulley Kit - WRX/STi MY03-07, Forester XT MY03-08-Pulleys-Speed Science

    GFB 3-Piece Underdrive Pulley Kit - WRX/STi MY03-07, Forester XT MY03-08

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    $429.00

    Like all GFB lightweight pulleys, these begin life as a single 6061-T6 aluminium alloy billet, which is then precision CNC machined to exacting to...

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    $429.00
  • GFB 3-Piece Underdrive Pulley Kit - WRX/STi MY08-on, Liberty GT MY03-on, Forester XT MY09-on-Pulleys-Speed Science

    GFB 3-Piece Underdrive Pulley Kit - WRX/STi MY08-on, Liberty GT MY03-on, Forester XT MY09-on

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    $429.00

    Like all GFB lightweight pulleys, these begin life as a single 6061-T6 aluminium alloy billet, which is then precision CNC machined to exacting to...

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    $429.00
  • GFB 3-Piece Underdrive Pulley Kit - WRX/STi MY94-98, Forester GT MY98-00)-Pulleys-Speed Science

    GFB 3-Piece Underdrive Pulley Kit - WRX/STi MY94-98, Forester GT MY98-00)

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    $429.00

    Like all GFB lightweight pulleys, these begin life as a single 6061-T6 aluminium alloy billet, which is then precision CNC machined to exacting to...

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    $429.00
  • GFB 3-Piece Underdrive Pulley Kit - WRX/STi MY99-00, Forester GT MY01-02)-Pulleys-Speed Science

    GFB 3-Piece Underdrive Pulley Kit - WRX/STi MY99-00, Forester GT MY01-02)

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    $429.00

    Like all GFB lightweight pulleys, these begin life as a single 6061-T6 aluminium alloy billet, which is then precision CNC machined to exacting t...

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    $429.00
  • GFB ATOMIC Manual Boost Controller-Boost Controllers & Solenoids-Speed Science

    GFB ATOMIC Manual Boost Controller

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    $119.00

    The Atomic has earned a reputation as being one of the most reliable and effective manual boost controllers on the market, boasting a repe...

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    $119.00
  • GFB D-FORCE Diesel Electronic Boost Controller

    GFB D-FORCE Diesel Electronic Boost Controller

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    from $439.00

    Features: 50psi capability Display boost in psi, BAR, kPa, or EGT in °F or °C Closed-loop boost control strategy 6 individually programmable boo...

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    from $439.00
  • GFB DECEPTOR PRO II (20mm inlet, 20mm outlet)-Blow Off Valves-Speed Science

    GFB DECEPTOR PRO II (20mm inlet, 20mm outlet)

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    $549.00

    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 ...

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    $549.00
  • GFB DECEPTOR PRO II (25mm inlet, 25mm outlet)-Blow Off Valves-Speed Science

    GFB DECEPTOR PRO II (25mm inlet, 25mm outlet)

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    $549.00

    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 ...

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    $549.00
  • GFB DECEPTOR PRO II (35mm inlet, 30mm outlet)-Blow Off Valves-Speed Science

    GFB DECEPTOR PRO II (35mm inlet, 30mm outlet)

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    $549.00

    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 ...

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    $549.00
  • GFB DECEPTOR PRO II (EVO I-X)-Blow Off Valves-Speed Science

    GFB DECEPTOR PRO II (EVO I-X)

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    $549.00

    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...

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    $549.00
  • GFB DECEPTOR PRO II (Silvia/200SX S14-15)-Blow Off Valves-Speed Science

    GFB DECEPTOR PRO II (Silvia/200SX S14-15)

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    $549.00

    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...

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    $549.00
  • GFB DECEPTOR PRO II (WRX MY01-07, STi MY02-on, XT Forester MY05-08)-Blow Off Valves-Speed Science

    GFB DECEPTOR PRO II (WRX MY01-07, STi MY02-on, XT Forester MY05-08)

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    $549.00

    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...

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    $549.00
  • GFB DECEPTOR PRO II (WRX MY08-on, GT Legacy MY03-09, XT Forester MY09-on)-Blow Off Valves-Speed Science

    GFB DECEPTOR PRO II (WRX MY08-on, GT Legacy MY03-09, XT Forester MY09-on)

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    $549.00

    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 take...

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    $549.00
  • GFB DECEPTOR PRO II (WRX/STi MY99-00, B4 Legacy, GT/XT Forester MY98-04)-Blow Off Valves-Speed Science

    GFB DECEPTOR PRO II (WRX/STi MY99-00, B4 Legacy, GT/XT Forester MY98-04)

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    $549.00

    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...

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    $549.00
  • GFB DECEPTOR PRO II - Skyline GTS-T R33-34, MPS 3/6, CX-7-Blow Off Valves-Speed Science

    GFB DECEPTOR PRO II - Skyline GTS-T R33-34, MPS 3/6, CX-7

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    $549.00

    GFB DECEPTOR PRO II - Skyline GTS-T R33-34, MPS 3/6 MPS, CX-7 Now you can control the sound of the BOV from inside the cabin! So how much more can ...

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    $549.00
  • GFB DV+ Diverter Valve - Late Model Euro-Blow Off Valves-Speed Science

    GFB DV+ Diverter Valve - Late Model Euro

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    $199.00

    GFB expands the DV+ range with a direct-fit solution for the weak factory diverter valve used on many European vehicles. GFB’s DV+ solution couldn...

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    $199.00
  • GFB EX38 - 38mm External Wastegate-Wastegates-Speed Science

    GFB EX38 - 38mm External Wastegate

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    from $499.00

    The EX38 features a 38mm valve and comes standard with a 10psi spring. Additional springs are also available - by using various combinations of 5p...

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    from $499.00
  • GFB EX44 - 44mm External Wastegate-Wastegates-Speed Science

    GFB EX44 - 44mm External Wastegate

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    from $599.00

    The EX38 features a 38mm valve and comes standard with 15psi springs installed (1 x 10psit outer and 1 x 5 psi inner spring).By removing one or th...

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    from $599.00
  • GFB EX50 - 50mm External Wastegate-Wastegates-Speed Science

    GFB EX50 - 50mm External Wastegate

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    from $689.00

    "with the manifold glowing...the boost never varies" Joe Signorelli Designed to cope with the brutal conditions of extreme exhaust temperatures, t...

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    from $689.00
  • GFB FX-S Fuel Pressure Regulator-Fuel Pressure Regulators-Speed Science

    GFB FX-S Fuel Pressure Regulator

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    $269.00

    The FX-S offers multiple fuel inlet and gauge ports that allow for a wide range of fuel system setups beyond the usual inlet/outlet, including par...

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    $269.00
  • GFB G-FORCE II - Electronic Boost Controller-Boost Controllers & Solenoids-Speed Science

    GFB G-FORCE II - Electronic Boost Controller

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    $439.00

    Electronic boost control with the GFB TMS touch G-Force II More Powerful Features, more Simplicity! Performance without the hassle - easier fitmen...

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    $439.00
  • GFB Hybrid Blow Off Valve - Mazda MPS/CX7/All Nissan Skyline excl R35-Blow Off Valves-Speed Science

    GFB Hybrid Blow Off Valve - Mazda MPS/CX7/All Nissan Skyline excl R35

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    $339.00

    The Hybrid is Back! Celebrating 20 Years Since the World’s First Dual Outlet Blow-Off Valve In a time before Justin Bieber, Y2K, and even Google, ...

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    $339.00
  • GFB Mach 2 Universal Blow Off Valve-Blow Off Valves-Speed Science

    GFB Mach 2 Universal Blow Off Valve

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    $279.00

    The simple & essential mod for 30% quicker boost! Using GFB’s TMS technology the Mach 2 can help return the engine to peak boost up to 30% fas...

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  • GFB RESPONS TMS (20mm inlet, 20mm outlet)-Blow Off Valves-Speed Science

    GFB RESPONS TMS (20mm inlet, 20mm outlet)

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    $399.00

    On the surface it may look like just another dual-port blow-off valve,but the Respons is actually much more than that. Featuring GFB's patented ve...

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    $399.00
  • GFB RESPONS TMS (25mm inlet, 25mm outlet - suits Bosch replacement)-Blow Off Valves-Speed Science

    GFB RESPONS TMS (25mm inlet, 25mm outlet - suits Bosch replacement)

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    $399.00

    On the surface it may look like just another dual-port blow-off valve,but the Respons is actually much more than that. Featuring GFB's patented ve...

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    $399.00
  • GFB RESPONS TMS (33mm inlet, 33mm outlet - suits EVO I-X)-Blow Off Valves-Speed Science

    GFB RESPONS TMS (33mm inlet, 33mm outlet - suits EVO I-X)

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    $399.00

    On the surface it may look like just another dual-port blow-off valve,but the Respons is actually much more than that. Featuring GFB's patented ve...

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    $399.00
  • GFB RESPONS TMS (35mm inlet, 30mm outlet - suits MY97-98 WRX/STi)-Blow Off Valves-Speed Science

    GFB RESPONS TMS (35mm inlet, 30mm outlet - suits MY97-98 WRX/STi)

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    $399.00

    On the surface it may look like just another dual-port blow-off valve, but the Respons is actually much more than that. Featuring GFB's patented v...

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    $399.00
  • GFB RESPONS TMS (GT-R R35 - 2 valves included)-Blow Off Valves-Speed Science

    GFB RESPONS TMS (GT-R R35 - 2 valves included)

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    $795.00

    On the surface, it may look like just another dual-port blow-off valve, but the Respons is actually much more than that. Featuring GFB's patented ...

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    $795.00
  • GFB RESPONS TMS (Silvia/200SX S14-15)-Blow Off Valves-Speed Science

    GFB RESPONS TMS (Silvia/200SX S14-15)

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    $399.00

    On the surface it may look like just another dual-port blow-off valve,but the Respons is actually much more than that. Featuring GFB's patented ve...

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    $399.00
  • GFB RESPONS TMS (Skyline GTS-T R32-34, MPS 3/6 MPS, CX-7)-Blow Off Valves-Speed Science
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    GFB RESPONS TMS (Skyline GTS-T R32-34, MPS 3/6 MPS, CX-7)

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    Original Price $399.00
    Current Price $385.00

    On the surface, it may look like just another dual-port blow-off valve, but the Respons is actually much more than that. Featuring GFB's patented ...

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    Original Price $399.00
    Current Price $385.00
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  • GFB RESPONS TMS (WRX MY01-07, STi MY02-on, XT Forester MY05-08)-Blow Off Valves-Speed Science

    GFB RESPONS TMS (WRX MY01-07, STi MY02-on, XT Forester MY05-08)

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    $399.00

    On the surface it may look like just another dual-port blow-off valve, but the Respons is actually much more than that. Featuring GFB's patented ...

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    $399.00
  • GFB RESPONS TMS (WRX MY08-on, GT Legacy MY03-09, XT Forester MY09-on)-Blow Off Valves-Speed Science

    GFB RESPONS TMS (WRX MY08-on, GT Legacy MY03-09, XT Forester MY09-on)

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    $399.00

    On the surface it may look like just another dual-port blow-off valve,but the Respons is actually much more than that. Featuring GFB’s patented ve...

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    $399.00
  • GFB RESPONS TMS (WRX/STi MY99-00, B4 Legacy, GT/XT Forester MY98-04)-Blow Off Valves-Speed Science

    GFB RESPONS TMS (WRX/STi MY99-00, B4 Legacy, GT/XT Forester MY98-04)

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    $399.00

    On the surface it may look like just another dual-port blow-off valve, but the Respons is actually much more than that. Featuring GFB's patented ...

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    $399.00
  • GFB Screw In Plug-Blow Off Valves-Speed Science

    GFB Screw In Plug

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    $24.90

    Screw-in Plug (block off recirc or atmo outlet)

    $24.90
  • GFB Shifter Upgrade For # 4003-Shifters-Speed Science

    GFB Shifter Upgrade For # 4003

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    $165.00

    This kit turns the basic 4003 short shift kit into the 4002 complete pro shift kit. GFB's Short Shift kits are like no other. Until you feel the a...

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    $165.00
  • GFB Short Shifter Kit WRX MY08-on-Shifters-Speed Science

    GFB Short Shifter Kit WRX MY08-on

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    $289.00

    GFB's Short Shift kits are like no other. Until you feel the action of one for yourself, you won't believe the difference! Why did GFB bother to ...

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    $289.00
  • GFB Short Shifter Kit WRX MY97-07, STi MY97-00, B4 Legacy MY98-02-Shifters-Speed Science

    GFB Short Shifter Kit WRX MY97-07, STi MY97-00, B4 Legacy MY98-02

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    $289.00

    GFB's Short Shift kits are like no other. Until you feel the action of one for yourself, you won t believe the difference! Why did we bother to ma...

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    $289.00
  • GFB Sti 6 speed short shifter (MY02-on)-Shifters-Speed Science

    GFB Sti 6 speed short shifter (MY02-on)

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    $395.00

    Following on from the popular WRX short-shift kit, GFB have now released a new version to suit Subaru's 6-speed gearbox found in all late-model ST...

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    $395.00
  • GFB Sti 6 speed short shifter (MY02-on) - basic kit-Shifters-Speed Science

    GFB Sti 6 speed short shifter (MY02-on) - basic kit

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    $285.00

    4003-image-1New from GFB is the STi 6-speed Short Shift Basic Kit (part # 4003), which has been designed as an infinitely more affordable alterna...

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    $285.00
  • GFB Subaru Lightweight Crank Pulley - All EJ20, 22 and 25 Engines-Pulleys-Speed Science

    GFB Subaru Lightweight Crank Pulley - All EJ20, 22 and 25 Engines

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    $229.00

    GFB have re-designed the WRX lightweight pulley to provide even more benefits. It is now shaped to look exactly like the factory Subaru pulley, so...

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    $229.00
  • GFB SV50 Blow Off Valve-Blow Off Valves-Speed Science

    GFB SV50 Blow Off Valve

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    $389.00

    The only BOV rated at over 300psi (That's more boost than 13 stock Mitsubishi Evo Xs combined!) GFB's New SV50; the highest flowing blow-off valv...

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    $389.00
  • GFB TURBO FUSE - Overboost protection valve-Boost Controllers & Solenoids-Speed Science

    GFB TURBO FUSE - Overboost protection valve

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    $255.00

    Something no turbo owner should be without… New from GFB is the Turbo Fuse, which is essentially the last line of defense for a turbo-charged engi...

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    $255.00
  • GFB Underdrive Crank Pulley Kit - MITSUBISHI EVO 4-9-Pulleys-Speed Science

    GFB Underdrive Crank Pulley Kit - MITSUBISHI EVO 4-9

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    $319.00

    New from GFB is the Under-drive Crank Pulley for the Mitsubishi EVO VIII & IX. Like all GFB pulleys, the material used is 6000 series aluminiu...

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    $319.00
  • GFB Whistling Trumpet-Blow Off Valves-Speed Science

    GFB Whistling Trumpet

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    $50.00

    You asked, we delivered. Many times we have been asked for a replacement trumpet that gives a different sound, and here it is. The ability to ch...

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  • Speed Science Stage 1 MPS Upgrade Package - MS3/6-Package Deals-Speed Science
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    Speed Science Stage 1 MPS Upgrade Package - MS3/6

    Speed Science
    Original Price $724.00
    Current Price $699.00

    Due to popular demand, we have created some upgrade packages using a selection of the best value for money upgrades we sell.  Whilst the likes of ...

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    Original Price $724.00
    Current Price $699.00
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