Suspension Spring I.D. help?

[Scott_S]

These lowering springs are for sale not too far from me. The ad describes them as "Ford Mustang Lowering Spring s '79-04"

Set of 4 red lowering springs, marked SKM79.001 (rear) and SKM79.002 (front). • Fits 1979–2004 Ford Mustang (Foxbody, SN95, and New Edge)

I Googled those numbers and found one really old thread that wasn't really clear. Does anyone have any info on how much the drop is, whether they're any good, etc.?

 

[Mustang5L5]

Is there a logo of any sort? Likely they are some sort of cheap ebay spring. SK Springs is a large manufacturer that makes automotive springs for various vendors and such. Unknown if this is their spring or not.

I wouldn't bother unless they are dirt cheap and you are on a budget build. Spend a few bucks more and go with a known, quality spring

 

[Scott_S]

They're asking $80.