Easy??? there is nothing easy about it. There is no point buying a GTS then converting it to a GTS-T. You will end up spending more money then just to buy a gts-t. Sell the GTS and buy a GTS-T. There are many things to upgrade. You have to get a turbo manifold, new ECU, New brakes, these are just the basic things. Too much money and i dont think its worth it.