Things needed for a 5-6 psi boost turbo kit?

i'm planning to buy a stage 1 turbo kit. i just want a 5 or 6 psi boost so that i don't have to install an intercooler and cos i have stock pistons. but what are the things needed from a turbo kit since i'm not installing an intercooler? turbo, turbo manifold, blow off valve, what else? that's why i only intend to do a 5 or 6 psi boost so that i don't have to change to larger injectors, piggy backs, and etc... i'm running a 4g92 sohc engine. high compression (also another reason why i only need a low boost)