It seems to me that if you have a GTP/WS6 with the optional chrome five-spoke wheels, the only thing that differentiates you from a "standard" GTP is that little 3-inch long badge on the back. Bummer. The average non-GP owner won't know the difference even with the 10-spoke wheels.
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2004 GS GTP/WS6
3.4" puley, BIG conical K&N filter
14.22@96.5 mph