A friend of mine set up a local dyno event for European vehicles for $100 each. I invited a boxster friend of mine who also has a modified boxster to come along with his. Here's the info on his.
2001 3.2 with the six speed and 131,000 miles. He bought the car a few months back for $6000 and instantly started modifying it.
New plenum with air diverter and 74mm throttle body from Pedro's Garage.
DME bench tune
4 inch under drive pulley
Fabspeed headers, sports cats and muffler
https://www.youtube.com/watch?v=U5EEfdoYPC4
He was very happy with his results.
I was up next with my highly modified boxster
2000 S with a six speed and about 65K
3.4 996 motor with intake and throttle body with 44k
987 airbox
996 ROW tune
Under drive pulley
Remote oil filter
Chinese headers
Custom made exhaust system using a 987 muffler
https://www.youtube.com/watch?v=ZJwESZUWt9A
While I was ok with the 279.36 HP, I wasn't really digging on the slightly lean fuel ratio or the wavy gravy power curve.