Focus rs manifold and downpipe and t25 or t28 turbo, fifth injector kit and keep the std management, get your lad to bolt it all on, he will need to mod the sump for the oil return and use an rs turbo oil feed, a few boost hoses here and there, should make 170 bhp with 9-10psi boost, std clutch should hold that and the gearbox should stay together. For more power you will need to go low compression and aftermarket standalone management ££££.