Ground Control custom rates and length. I plan on ordering 300f 400r but what length?? 98 civic DX

 

call GC and go with their recommendations.

 

I would recommend 8" front springs for that car. 7" springs will be fine for the rear.

For using Ground Control's recommendations, I followed it once, and the recommended 7" front springs could not get my car high enough to have some decent shock travel.