1)the tritec engine can be bomb-proof...it's suppose to be a very strong engine that can stand up to time if take care of.. but then that's true with almost all engines
2)over time, the more power you put into the engine will cost wear and tear faster... now they are unmesurable, but over time.. i believe that things will happen...
yet in the same time... ppl have run pullies, ecus, stuff alike for years on the track without any ill effect.... the bottom line is still take care of the engine's vital fluids and it will last
mods wise... exhaust and intakes hardly will damage any engine parts... it's almost impossible for these stuff to hurt the engine..
me? i've done some mods to it and so far not a single problem other than a bigger smile than ever b4! im probably gonna switch out this mini for a new one in 4 years when the new peugeot sorced engine comes in...