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Location: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)
Posts: 16,182
I'm not sure anyone knows the upper limit. But on my GT, the factory rev limiter is set at 6250. Brenspeed reset it in their tune to 6800 and I moved it back down to 6500 RPM. And I bounce off it on occasion.
7000 might be a tad higher. I would say you can push as far as 6500 on stock internals, but would go above that. you'll most likely start bending/breaking internals.