Hello i used front brembos from evo6 on my car but i would like to have smaller discs than 17". So my question is are there any brake discs that fit the brembos calipers that are smaller size than the oem size? Like 300mm? Or any other cars discs that are compatible?

 

Its more than just a smaller disc. You would have to change the caliper mount to bring the caliper farther from the wheel also. Look at STM for their small brake kits.