It all depends on the condition of the engine. You can boost an engine with 200k miles if it wasnt beat the shit out of. On the other hand, an engine with 5k miles may blow. All turbo applications need build up, throwing a turbo/downpipe/manifold/ wastegate on a stock engine WILL blow, it's a matter of time. Build up the engine (valve train, pistons/rods, cam, tuning, etc) and you are good to go.