Description
Product
GFB2014
The Underdrive Pulley Kit promotes faster engine revs and more performance in the Subaru STI.
Go Fast Bits Underdrive Pulley Kit
HIGHLIGHTS:
- 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 the 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
REDUCING ROTATIONAL MASS IN THE ENGINE ADDS HORSEPOWER
The Go Fast Bits Underdrive Pulley Kit features lightweight aluminum construction. This kit will include a lightweight crank pulley, power steering pulley, and an alternator pulley. These are direct replacements for the factory pulleys and the weight savings will allow for a faster engine response with faster revs.
Additionally, these pulleys will come in an anodized black finish to add a clean look to the engine bay, making these pulleys a great performance and aesthetic upgrade.
Specifications
| Color | Black |
|---|---|
| Belt Included | Yes |
| Location | Crank, Alternator And Power Steering |
| Material | Aluminum |
| Pulley Ratio | Underdrive |
| Weight | Multiple |
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