I recently bought Ground Control coilovers for my car. The shop I bought them from I have been buying things from for year. I trusted there advice by telling me that GC has the correct spring rates already figured out for my car. Im not too knowledgable when it comes to suspension stuff. In the kit I received spring #150.64.66 for the front and #200.64.44 for the rear. What are the spring rates of these springs? I've done some searching around but could not find these spring part numbers. Thanks for any info you can supply me.

 

Those #'s are not reading like Eibach part #'s. I thought GC used Eibach springs exclusively, but maybe they're branding their own now.

Best you call the tech line on GC's website and ask them what you've got.

 

Yes, Grouhd Control does use Eibach race springs, but they have GC p/n's on Eibach springs. A call to GC should clear everything up.

(530) 677-8600

 

Just a wild guess, but I bet you have 150 pound fronts and 200 pound rears from the part numbers.

 

I believe it is metric . Length/diameter/rate.

200mm/64mm/44 kg per mm

May be wrong on this.

 

Interesting, thanks for all the reponces guys.