H&R springs for S6 C6

A6 All/ S6 All
#1

Hey all, I purchased a 2007 S6 with 127K KM on it. I found that it had aftermarket lowering springs from H&R. I thought it looked a bit too low and also found that all the bushings in the upper and lower control arms were hatched (this may be related or maybe not.)

After some part number searching I found that the springs were H&R 29200-2 springs which are actually A6 lowering springs for a 1.6" front and back drop to the car…

My question would be. Is the stock S6 lower than the A6 and what would that mean for the overall lowering and stress on control arms and other suspension?

My plan is to either go back to stock springs or get the proper H&R 50317 that offer 1.1" back and 1.3" front lowering. I have just finished a full control arm replacement on the front and don’t want to have to do that job again anytime soon.

Thoughts?

#2

The technical data I have seen says the S6 sits slightly lower than the A6. Still you should be fine using the A6 parts as many have done in the past with no issues. Obviously make sure you have new control arms and check your bushings before hand also check the cars alignment.

IMHO if you have enough wheel clearence and no rubbing issues I usually see that as fine. once you need to get spacers and have rubbing issues you tend to notice that other stress issues tend to follow. I know a few good S6 guys on here get adjustable coil overs and they really lower the car down and we have seen no bad reports of any issues with them

#3

The bad reports come from using springs on the C6s. Coilovers allow correction while lowering apparently so that’s why the coils have no issues but the springs do. There’s a large thread on AZ dedicated to the issues that come with lowering the C6. But those issues seem to only be when springs are used or alignment done wrong.

#4

Thanks for this info. No coil overs yet on this car but I will keep an eye on the control arms to see if the bushing are going to rip to hell again. After I replaced them all (upper and lower) there is a noticeable improvement in handling, I just didn’t want to prematurely wear anything out if the lowering springs were incorrect for the car. No rubbing is occurring. I always have the option of going back to stock but they are expensive even if I do the work myself.