Help me all sifu's ! i want to upgrade my stock evo 3 turbo to bigger one .. but i'm not sure what turbo to choose between A/R60 or TDO5 20g or A/R 70 
when i upgrade the turbo can stock piston tahan the boost from big turbo ? or should i change the pistons ? what type of pistons should i change ?
headache
!! PLEASE HELP ME OUT

when i upgrade the turbo can stock piston tahan the boost from big turbo ? or should i change the pistons ? what type of pistons should i change ?

