Go Fast Bits Underdrive Pulley Kit - Subaru Models (inc. 2008-2014 WRX / 2008+ STI)

Spectral Performance is proud to carry a great selection of automotive performance upgrades and accessories brought to you by Go Fast Bits. 

Here, you are looking at the GFB Pulley Kit for the 08-14 Subaru WRX and 08+ STI. This kit consists of a lighter crank, alternator, and power steering pullies that save weight and rotational mass to improve the engine response.

DETAILS:

• Lightweight aluminum construction
• The crank pulley weighs .86 lbs
• Power steering pulley weighs .37 lbs with 18% underdrive
• Alternator pulley weighs .14 lbs with 16% underdrive
• The total mass of GFB pulley kit is 1.38 lbs
• Mass savings for STI models: 5.31 lbs
• Mass savings for WRX models: 4.43 lbs
• AC compressor will still operate at normal speeds
• Includes new belt
• Black finish