you need alot if you plan on piecing it together for the exhaust manifold,turbo,wastegate,piping,bigger injectors,missing link might be nice,bigger fuel pump,lower compression pistons would be nice to not really needed at first unleast plan on running higher boost,if you want to port and polish the head you can it might end up making it higher compression depending on whats done,maybe some turbo cams would be nice too,maybe a after market intake manifold or port the one you have,intercooler would be nice or just by a kit drag kit,greddy,hks,apexi there alot out there already pieced together