Yes, no problems with standard dampers, they work really well for fast road. You might get some bounce at high speed as the damper would have been designed for a full length spring like a Pro Kit rather than a Sportline but the match is pretty good. I whacked them on a Pro Damper which is not far off the standard GTi damper - if you ask Eibach/Sachs.
I only changed my dampers as it was no extra labour cost on top of doing the springs, so did both at the same time - oh, and my damperssprings had done 100,000 miles, they get a bit saggy after that.
