does having sport chrono and i guess pasm, where the car's susp stiffens up with the push of the button, can i install h&r's or some lowering springs/shocks or whatever and all that stuff will still work?

 

The sport chrono electrically adjusts the coil-overs. If you replace the stock ones with Damptronics, the functionality is maintained. Just replacing springs has no effect on the functionality of the coil-overs. I opted for the Damptronics, which allowed me to lower the car by an adjustable amount, whereas springs are a fixed amount of lowering.

 

springs only , will just lower it and stiffen it a bit over stock

 

As they say go for the damptronics...pss10's are good..there are others.

 

are the damptronics oem or aftermkt, and would they be available 'over here'?

 

aftermarket... should be..there bisteins (sp?)

 

Yes, the Damptronics are made by Bilstein, so would expect them to be easily available in Germany. There are different models for each of the 911 models (C2S vs C4S vs TT etc.).

 

You can also replace the springs and everything will still work.