I have been pondering this question for awhile now. These Ford Racing coils springs that they sell that are so cheap(usually $130.-$160.) are they worth going to for a suspension upgrade? I know they are not progressive rate like Eibach Pro kit I am so in love with but does anybody have any experience with this type of spring upgrade? Pros or cons??? Every time I plan my suspension upgrade and add everything up these springs keep looking enticing with $100+/- difference compared to say the Eibach kits. Any thoughts, guys???