From the Pontiac website:
Inches/#...2004GTP...2003GTP
Length......198.2........196.5
Width.........71.6.........72.7
Height........55.9.........54.7
Weight.......3385.........3559
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2004 GS GTP/WS6
3.4" puley, BIG conical K&N filter
14.22@96.5 mph