the stock zc internals i beleive, can do max of prolly 250whp with like... elite tuning.
200whp is doable with normal tuning.
a b16 however... that can do.... 300+whp with awesome tuning, when boosted of course.
200whp n/a in a b16 is doable as well... again... with elite tuning.
hell, my car should be around 170whp after its tuned, its a n/a b16.