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Rear Lower Control Arms - Ford Performance vs Ford OEM Difference?

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FWIW, UPR is a great company, located not far from me, but their stuff is dragster oriented, meaning light weight.
A lot of it is chromoly, which I prefer, but... it is also prone to cracking, especially in road race applications. Mild steel seems to work better for us. A few years ago they talked about bringing out a road racing oriented suspension, but I'm not sure they ever did. They had plenty of work in the drag racing realm.
 
Correct, so far so good. Stock upper and a whiteline PHB. More constrained than stock, but the suspension has fluid movements. NVH picked up slightly.
My '13 Brembo GT had axle hop for 11 years on the "harder durometer bushing" stock stamped LCAs. I *finally* got around to putting on Whiteline LCAs last week and it's instantly better. Not perfect, but worlds better. The rear either hooks up or breaks loose now, none of the "rubber band winding up" and thumpthumpthump it did stock. The stock voided bushings were also trashed by this point, but honestly it hopped badly from day 1 on.
Related; the transition into power-on oversteer is also much smoother now, which I guess could be viewed as a positive or negative depending on whether you're a driver or a lawyer.
This is all with the stock pickup points and ride height, no relocation brackets installed.
 

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