Posting a fairly short review regarding the Koni STR.T kit for front wheel drive C5 A6s.
This is my girlfriend's A6. She wanted something a little lower than factory ride that was not too harsh. After some research we settled on the STR.T kit.
We purchased the kit, part number 1120-7931.

We have now had the kit on the car for just over a year, which I feel is ample time to provide a long-term review of the kit.
I will paraphrase the ride quality as much as I can.
  • H&R sport springs included, the spring rates are just a touch stiffer than the original springs. Very pleased with the springs
  • The ride height is perfect. It seemed to lower the car approximately 1.5 inches all around. We have not bottomed the car out or hit anything as a result of the ride height
  • Shock dampening seems perfectly matched with springs. There is virtually no roll in corners and it is not bouncy at all. Just a nice, sporty ride.


Overall: Very pleased. No issues with the suspension kit at all. Rides as good a year later as it did when first installed. Perfect for those who want to retain OEM ride quality with slightly upgraded handling / cornering and desire a moderate drop.
Sorry I don't have a before pic, but here is how the car sits now with the kit installed (wheels are 18" from oewheelsllc with 225-40-18 tires):



If you have any questions, feel free to post them here or send me a PM.