There are like 60 bazillion different turbos that are considered to be "T3/T4".

Basically you will need the following:

manifold
turbo
wastegate
intercooler
bov
charge pipes
downpipe
oil line for turbo
boost gauge

For fuel, a decent setup is the following:

high volume fuel pump
high-flow fuel injectors (either DSM 450 cc/min or RC 440 cc/min)
a'pexi v-afc