@ yellowporscheman
You have a 00'+ so that means you have 4 cats. You can get secondary cat bypass pipes for $500,gain 9hp and shed 30lbs.
http://www.epiqautosport.com/pro_boxster_secondary_catalytic_bypass_pipes.php
Then you could do the intake. Gain 8-10hp for $400. Easy D.I.Y.
http://www.epiqautosport.com/pro_boxster_fabspeed_high_performance_air_intake.p hp
The jury is still out on this one,Che's(Board Sponsor) 00'+ headers. I have only read on review w/o a dyno graph for 00'+,gain 6hp. $470
Now with novice mechanic skills you could do all those in your garage in a day and give some "S" a run for their money. Oh yeah and with the money you save from installing the parts yourself you could put in RoW sway bars!
Why not head to the track and see if you can handle the power in turns? Everyone that I know that tracks their Boxster doesn't complain about the power,it's more then enough to have fun in turns!
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-99' Zenith Blue 5-spd...didn't agree with a center divider on the freeway
-01' S Orient Red Metallic 6-spd...money pit...sold to buy a house