will those bend your wheels? new fluid might help, i have the same problem going into second gear. try slipping into highr gear then select your gear moving shifter around helps, thankfully it has'nt been super cold out
200 gives you more raw of a feeling than the S6 does, my friend has an IA chipped 200 20vt and my S6 pulls on him, but when in his car it feels faster, pepier, is it cause there is less insulation and bulk to the car?
the plus is a great model and the V8 is a grand engine, but I got to tell you your URS4 has way more potential. you can add every cosmetic option from the plus to your S4, (I have the S6plus front end on my 95 S6). a chip itself can put our near the same hp as the plus, and don't forget how it feels when the turbo spools.
but you could turbo the v8 and well that would be sweet