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Originally Posted by White Comet
The boxer engine is amazing. Low centre of gravity, compact, stout, and once you take off the restrictive stock piping and replace it with aftermarket ones, it sounds like nothing else in the automotive world. Pure bad-ass.
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I've never owned a boxer powered engine before, but if it follows the same rules as other motors, that wouldn't be quite as much of a HP gain as you think, in NA form.
You're probably basing that off of what you did to your WRX turbo motor, and yes, turbo motors from the factory are notorious for getting extremely restrictive exhausts. So replacing those can typically add to a great, cheap way to add 20+ HP. NA motors don't get near as much power gains from replacing small bits like those, but what you do get is a better powerflow, typically in the mid-range, but it really depends on what kind of exhaust you're putting on.
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If you want 200 hp from a NA 2.0L, expect it to rev high, like 8000. Also expect the torque to be around 140-150.
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Torque estimate is pretty much correct, which wouldn't bother me in the least. I'd much rather have a car that performs in the high revs than something that likes to take off from a dead stop and then feel 'lethargic' in the higher Revs.