Rarity?

While looking into brake upgrades for my daily driver (not an A-body) I came across these:



Basically they nudge the disc pads slightly away from the rotors when you take your foot off the pedal. Reviews I see around the web suggest they won't make other problems I might worry about (long pedal travel, etc), and I found one site where a guy made a set out of steel utility wire ("piano wire") for an application not available off the shelf.

Not at all, take Honda Accords & many others that use a spring wire spreader(actually 2 per side frt. 1 per side on the rear[bottom]), they are not strong enough to exert
"push-back", just assist in a quick clean release. If You drill little receiver holes in the pad backing plates & had room to the caliper body it would be an easy adapt deal.
Newer Rams have an abutment shim that clips to the ends of the pads, but have an arm that hits the inner/outer bracket faces pushing the pads away from the rotor.