Go Fast Bits Subaru BRZ/86/FR-S Lightweight Water Pump Pulley

Like all GFB lightweight pulleys, these begin life as a single 6061-T6 aluminium alloy billet, which is then precision CNC machined to exacting tolerances. We then anodize them black for a stealthy...

Go Fast Bits Subaru BRZ/86?FR-S Lightweight Crank Pulley

Like all GFB lightweight pulleys, these begin life as a single 6061-T6 aluminium alloy billet, which is then precision CNC machined to exacting tolerances. We then anodize them black for a stealthy...

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

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

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

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 didn’t...

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 model for...

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

Go Fast Bits Subaru WRX 08 Short-Throw Shift Kit

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 further… Adjust...

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 didn’t...

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 model for...