drburton, in short, the answers to your 2 questions are; yes and yes!!
It is OK to push the car into the 6,000 RPM range, and yes this does increase wear & tear. Hard to get one without the other. I don't think this will be detrimental or harmful. Just don't bounce of the rev-limiter day-in & day-out. And do the proper maintenance.
Your peak power curve is in the 4,500-5,500 RPM range.
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