i saw they are selling at ssgti. price: 100usd
some guys in spore had purchase this.you will gain 5% improvement straight away. this is an easy hassle free mode. disadvantage is that te smaller pulley might reduce the chanrging.so far no issue.
fyi, its not only smaller but also lighter. they use special material.
my fren is using an apexi avcr on his car... his got broken into, luckily he took out his avcr, emanage n etc... his boostmeter, timer , bov, regulator n his avcr solenoid got stollen... now ive gotten...