I decided to make a few upgrades to my 2005 Boxster S and "convert" it into a more track-oriented car:

- FVD ECU tuning and BMC sport air filter (increase to ca. 300HP)
- Sport clutch (good for 600Nm)
- Lightweight single flywheel
- Recaro Pole Position racing shells with Schroth 6-point belt
- Strut brace in front
- Boxster RS60 front spoiler
- Spacers 15 mm front and 18 mm rear

I was considering installing Bilstein PSS9 as well, but the car already has H&R sport springs and I am pretty happy with these. I have also been looking at installing a differential, both FVD and Quaife have these for the Boxster (total cost including installation is about the same as the list price for the 997 Turbo limited slip differential).

A more detailed report with photos will follow once the car is ready...