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Go Fast Bits engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Go Fast Bits lineup with fast shipping and expert fitment support — order with confidence.
Go faster by adding lightness. The GFB 3-piece under-drive pulley kit is a precision-engineered upgrade for your 2002-2008 Subaru WRX or STI. By significantly reducing the rotating mass at the crankshaft, alternator, and power steering pump, this kit allows your engine to rev more freely. Experience sharper throttle response and faster acceleration without the need for complex engine tuning or additional modifications.
This kit is designed for enthusiasts who want a noticeable performance gain that can be felt in every gear. The under-drive design slows down the accessories slightly, reducing the load on the engine while maintaining reliable operation. Whether you are daily driving or hitting the track, this GFB pulley kit is a must-have for any Subaru performance build. Upgrade your engine's responsiveness with high-quality parts from GGCRACING.
| Years | Make | Model | Trim |
|---|---|---|---|
| 2004-2005 | Subaru | Forester | XT |
| 2005 | Subaru | Forester | XT Premium |
| 2006-2008 | Subaru | Forester | XT Limited |
| 2008 | Subaru | Forester | Sports 2.5 XT |
| 2002-2007 | Subaru | Impreza | WRX |
| 2003-2004 | Subaru | Impreza | Outback |
| 2003-2005 | Subaru | Impreza | RS |
| 2004-2007 | Subaru | Impreza | WRX STI |
| 2005 | Subaru | Impreza | Outback Sport |
| 2006-2007 | Subaru | Impreza | WRX Limited |
| 2006-2007 | Subaru | Impreza | WRX TR |
| 2007 | Subaru | Impreza | WRX STI Limited |
Other popular Go Fast Bits products customers consider together:
Go Fast Bits engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Go Fast Bits lineup with fast shipping and expert fitment support — order with confidence.
Go faster by adding lightness. The GFB 3-piece under-drive pulley kit is a precision-engineered upgrade for your 2002-2008 Subaru WRX or STI. By significantly reducing the rotating mass at the crankshaft, alternator, and power steering pump, this kit allows your engine to rev more freely. Experience sharper throttle response and faster acceleration without the need for complex engine tuning or additional modifications.
This kit is designed for enthusiasts who want a noticeable performance gain that can be felt in every gear. The under-drive design slows down the accessories slightly, reducing the load on the engine while maintaining reliable operation. Whether you are daily driving or hitting the track, this GFB pulley kit is a must-have for any Subaru performance build. Upgrade your engine's responsiveness with high-quality parts from GGCRACING.
| Years | Make | Model | Trim |
|---|---|---|---|
| 2004-2005 | Subaru | Forester | XT |
| 2005 | Subaru | Forester | XT Premium |
| 2006-2008 | Subaru | Forester | XT Limited |
| 2008 | Subaru | Forester | Sports 2.5 XT |
| 2002-2007 | Subaru | Impreza | WRX |
| 2003-2004 | Subaru | Impreza | Outback |
| 2003-2005 | Subaru | Impreza | RS |
| 2004-2007 | Subaru | Impreza | WRX STI |
| 2005 | Subaru | Impreza | Outback Sport |
| 2006-2007 | Subaru | Impreza | WRX Limited |
| 2006-2007 | Subaru | Impreza | WRX TR |
| 2007 | Subaru | Impreza | WRX STI Limited |
Other popular Go Fast Bits products customers consider together:
