Their cars, some have the SL kit in their cars.

I have only limited time behind the wheel of an RS4 with DRC and with the MS kit installed. However there is no doubt in my mind the cars I drove with the MS kit in them were better performer and to me the ride quality was a non issue.

If you are not going to track the car or going to do it once in a while, in other words you are not going to make this your primary track car, then perhaps the SLs are for you.

Assuming you decide to put in either one of the kits and you feel the need for more "rotation" from the car, then there is always the rear H-Sport solution open to you.

Also you can play with some alignment parameters to get the car even more livelily.

Quarter mile in 13.3 seconds at 107.3 MPH!