The GFB underdrive pulley kit designed and manufactured for Subaru MY08-on WRX/Sti is made from lightweight aircraft grade aluminium.
Go Fast Bits
GFB 2008 - 2021 WRX/STi / 2009 + Forester / 2003 - 2009 LGT 3 pc Underdrive/Non-Underdrive Pulley Kit
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