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.

Kinugawa Japan CT26 3SGTE SW20 ST185 60-1 upgrade kit
Radiator Cap - Violence - small head 1.3bar 