If its on coilovers and low why do you need to have diffrent drop links or adjustable ones? :S

The drop link needs to be shorter with some coilovers because when lowered the driveshaft can foul on the Antiroll bar. The shorter droplink makes the ARB sit higher and stops it fouling. It's not usually needed on more expensive coilovers (AP, KW, Eibach, Weitec etc...) as they have a droplink mount which is offset upwards to compensate for this.

Mondeo 1999-2006 links are short enough for the lowest u will go on coilovers + there only £10 delivered for a pair off the bay...

Cheers