Can anybody comment on best quality lowering springs for the 2021 C63S AMG Coupe?
I'm not looking for coilovers or adjustable springs. I'm simply trying to figure out best quality lowering springs that would be a direct replacement for stock springs. These would be springs that will lower the car, and wheel arches, by 0.75 - 0 85 inches, allow for a better looking stance, and some improved handling during both aggressive daily driving and also 15-20% track duty.
Thank you.

 

Vogtland Lowering Springs Mercedes C-Class W205 AMG Coupe/ C63 AMG/C63 – Redline360

Eibach Pro Kit Lowering Springs Mercedes C63 AMG Sedan W205 (15-19) E1 – Redline360

H&R Sport Lowering Springs - W205 Mercedes C63 C63s AMG Sedan 2015 +– AutoTalent

These are the most common ive seen/read about.

My local shop recommends HR over Eibach. He felt Eibach were a little "softer". He has no experience with Vogtland.

Im planning to go with HR. They all drop 0.8 F/R except Eibach, 0.4 rear.

 

I have eibach pro on my sedan. 13000km on them so far and couldn't be happier. No noises or issues at all. They are more progressive than oem springs which makes them feel a little softer but ride and handling definitely feels better than oem.
I know HR springs tend to lower the car more than advertised.

 

Thank you both for the feedback. I appreciate it.

 

Why does Eibach spring set lower 0.8 inches front and 0.4 inches rear, whereas H&R lowers both front and rear 0.8 inches? Does Eibach have different stiffness for their front and rear springs, or does their differential lowering allow for bigger rear tires, as compared to H&R?
I'm looking to increase front tire size to 265/35/19 and rears to 305/30/20. Should both of these spring sets accommodate the larger tire sizes?

 

Not too sure but my guess for the eibachs it's so the car is level and doesn't have any rake. They feel the same to me but you'll have to ask eibach if front/rear have different stiffness to be sure.
For tire size pretty sure you can but maybe another member with a coupe can chime in and confirm. Think there was another thread on tire size on stock coupe wheels recently. Try a search.

 

Typically the lower the springs go, the stiffer they are to prevent bottoming out, therefore its gets more "bouncy". This is coming from the Subaru STi world. Im not sure how that translates to these kind of german vehicles as Im sure most people dont want a luxury sports car to be bouncy. However it would make sense the lower the springs go, the firmer they are going to be.

IF you call Eibach and ask them their spring rating for front and rear, im sure they will be able to tell you.

 

Cool. Will call them Monday. Thanks.

 

what did you go with? I am looking to do the same

 

I have carbahn. They’re technically a direct replacement as they’re specifically made for the c63 coupe with the correct spring rate. I have lower the rear to max and front almost max out. They’re a-lot more comfortable verses stock & is progressive and cornering, body control in comfort feels like sport plus. They ride significantly better when I first lowered the car only half an inch. I think thats the sweet spot. Doesn’t crash when hitting pot holes anymore. Love it. I think you’d love these if you’re only lowering them by that much