wait till the injectors max out, the fuel pump shits it, the afm is too small, the std turbo is too small, the exhaust needs to be free flowing, the exhaust manifold sucks, the cams will be played with at some point, the pfc is installed (then tuned with a datalogit - u will need to do this), then when u think you have finished upgrading the gearbox will go, the rear subframe will now flex on its old mounts, and finally the tyres that you classed as expensive will be a must because there is no way the torque will get put to the ground.....
Thats about 9k (being conservative)....
But the actual motor is a cheap job..... :lol: