i have the code 3 and love it. if i had to get a crank pulley 178 would be my choice.
tuning is the key no matter how you go. get eurocharged and a dyno tune you will love it.
cooling mods are a big advantage as is exhaust work. again eurocharged has headers now.
with the pulleys the needswings pulley saver kit is a big hit! i now have a psk for my c3 and after more testing rob will offer it with the other kits

enjoy!!