Bump stops from a WS6 car???

I installed WS6 springs/bilstein hd's on my non-WS6 bird back in spring. I just ran across this on another website.

Also noted is the fact that with the FE7 Showroom Stock package,
like the WS6, the jounce bumper is 15mm shorter than all other bumpers and rear jounce is restricted by placing a 15mm spacer under the jounce bumper.

Since the WS6's have the shorter bumper, would it be a good idea to get the shorter ones for my car since I have the WS6 springs on it now? Would going to the shorter ones allow a little more axle travel and reduce the harshness of potholes any?

Or should I just stick with the stockers if they aren't falling apart? And where exactly are these bumpers located at on the chassis?

The bump stops are at the bottom of the wheel well, straight above the axle. Take off one of your rear wheels and you'll see it. I doubt you'd need to change the bump stops. If you're concerned about it, just knock 15mm off the bottoms of your stock bump stops with a grinder, being careful not to destroy them in the process.