stock s13 wheels are 15x6 +40. the wheel would only stick out an extra 1/2"; 1/2" to the outside and 1/2" to the inside. that's not even close to being flush, let alone stick out.
there is a thread of s13 wheel sizes, check it out and see what the right size wheel will do for the look of the car.
here's a good thread, not may offsets listed, but you get the idea of what nice wheels look like.
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Modified by cdlong at 9:12 AM 10/14/2005