Swap CRX pistons in Civic Vtec

[ghettochildpr]

Well i got a 94 civic vtec, im repairing the engine now and i got 4 pistons of a CRX Si from a friend, i just wanna know if someone has put on these pistons in dat engine and if they didnt had any problem, or if someone knows if the valves will hit the pistons or something, i just wanna give my car a lil bit of more torque since i dont wanna spend money cause i dont wanna use dat car to race n stuff, and the CRX pistons are more higher in da middle dan da ones da civic has, i hope someone can help me out with this or sumtin, ill really appreciate it. Thanks in advanced!!