ASAP, it does help with the side to side flex, but I also have the M3 subframe bushings, and those were a bigger improvement. I'd upgrade the subframe bushings first.
As far as pressing them in, I just bought a set of used arms off e-bay, and took those and the new bushings to a local BMW race shop, and they pressed the rubber bushings out, and the new ones in.
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2009 135i, Alpine White, 6MT, M-Sport, iDrive, iPod/USB, Heated Seats, Premium Sound, BMW Assist
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