Once I bought a new Termignoni 4-2-1 system and it included similar brackets to space out the cooler a bit. Everything was cool, until the first proper braking action, the steering was locked solid under nearly full compression. Turned out the front mudguard was touching the cooler.
A short session with the angle grinder was enough, I just removed 2 cm from the rear of the mudguard.
And if I were you I would put the rubbers in those brackets, just like the original bottom cooler mounts.