Go Fast Bits Subaru EJ20, EJ22 & EJ25 Engine Lightweight Engine Pulley

GFB lightweight pulley kits are made from aircraft-grade 6061-T6 aluminium and offer faster acceleration through significant weight reduction on the crankshaft...

Go Fast Bits Subaru STi 02 6-Speed Basic Short-Throw Shift Kit

  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...

Go Fast Bits Subaru STi 02 6-Speed Short-Throw Shift Kit

  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 make...

Go Fast Bits Subaru WRX 01-07, STi 02+, XT Forester 05-08 Hybrid Dual Outlet Blow-Off Valve

In a time before Justin Bieber, Y2K, and even Google, the year is 1998 and GFB’s founding engineer John Adrian is so sick of his new WRX stalling with an atmosphere-venting BOV he decided he...

Go Fast Bits Subaru WRX 01-07, STi 02+, XT Forester 05-08 Mach 2 TMS Blow-Off Valve

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...

Go Fast Bits Subaru WRX 01-07, STi 02+, XT Forester 05-08 Respons TMS Blow-Off Valve

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 venting bias adjustment system, the...

Go Fast Bits Subaru WRX 08 Short-Throw Shift Kit

  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 make...

Go Fast Bits Subaru WRX 08+, GT Legacy 03-09, XT Forester 09-12 Deceptor Pro II Remote Adjustable Blow-Off Valve

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...

Go Fast Bits Subaru WRX 08+, GT Legacy 03-09, XT Forester 09-12 Hybrid Dual Outlet Blow-Off Valve

In a time before Justin Bieber, Y2K, and even Google, the year is 1998 and GFB’s founding engineer John Adrian is so sick of his new WRX stalling with an atmosphere-venting BOV he decided he...

Go Fast Bits Subaru WRX 08+, GT Legacy 03-09, XT Forester 09-12 Mach 2 TMS Blow-Off Valve

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...

Go Fast Bits Subaru WRX 08+, GT Legacy 03-09, XT Forester 09-12 Respons TMS Blow-Off Valve

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 venting bias adjustment system, the Respons...

Go Fast Bits Subaru WRX 97-07, STi 97-00, B4 Legacy 98-02 Short-Throw Shift Kit

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 make a short shift kit, when there...