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 304mm 4-pot (16") Front
BC Camshafts RB26DETT stage 2 / 3 