Kartboy Aluminum Single Belt Crank Pulley 2002-2014 WRX / 2004-2021 STI | KB-050-EJ-S

SKU: kbyKB-050-EJ-S
Availability: 7 In Stock
Type: Engine Pulleys
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Fitment Information:

2004-2021 Subaru STI

2002-2014 Subaru WRX


  • Weight - 1.8lbs
  • Black Anodized Coating
  • Material - Durable Aluminum
  • Improves Throttle Response
  • Improves Rotational Mass

Kartboy has created a solution for owners who delete their AC compressor. This is a lightweight crank pulley that will reduce the overall rotational mass of your engine, and the result is improved engine response, along with faster revs.

NOTE: If you have not removed your A/C, THIS is the correct pulley for you.


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