Originally Posted by Em370z

I just wanted to know what is the difference between these option thats in the picture under select on the right lower corner? Thanks

Originally Posted by GalletGun

a true coilover doesnt utilize an independent spring and strut for the rear like oem. The speing is part of the shock. therefore u would need to get spc or spl arms for the rear to compensate for the lack of a spring in the bucket.