These light weight alloy CnC machined pullies will provide reduced rotating mass compared to the stock pulley and save you precious horsepower throughout the rev range. They also under-drive attached accessories. Suit 4G93 as found in the lancer GSR and Libero.

Yellowspeed Brake Kit 356mm 6-pot (18") Front
Clutch kit Subaru WRX/STI GDA\GDB Sport Ceramic
Yellowspeed Brake Kit 330mm 6-pot (17") Rear
DPR 500 internal fuel pump W/ Fitting kit
BC Camshafts 4G63 EVO 9 stage 2 / 3 / 4 