Installing a BMR rear upper control arm in your 2011-2014 Mustang GT can be a good upgrade, or for some people a not so good upgrade. The BMR upper control arm is much stronger than the stock upper control arm and comes with polyurethane bushings (greaseable spiral fluted polyurethane bushing) versus the stock control arm, which uses rubber bushings. Switching over to poly bushings has many benefits over the stock rubber bushings such as, reducing or eliminating wheel-hop, improve traction during straight-line acceleration, quicker launches for faster sixty foot times and better handling during cornering (corners sharper and more precise).
Now the upgrade to the BMR rear upper control arm while being a very good choice, may for some be a poor choice, this would be only if you cannot deal with a bit of gear whine noise after the install. Factory rubber bushing block noises, but poly bushing will allow noise to be heard easier inside your Mustang GT. We find the benefits of using the BMR upper control arm are much greater and not all that bad to deal with in the noise area. Just putting your radio on low will block these small noises so not much of a fuss to really deal with.
If you do decide to install the BMR rear upper control arm, it is highly recommended you also use their rear upper control arm mount which is much stronger than the stock piece and is an easy bolt-on using existing mounting holes, no welding, no drilling is required, direct replacement. If your Mustang GT is lowered, you would use the top hole in control arm mount and the bottom hole (hole closest to ground) for stock ride height Mustang GT. Always make sure to torque all nuts/bolts to proper specs and do use blue Loctite on all treads to keep thing in place. Also make sure that all is greased properly before driving the vehicle.
Now as far as doing this job yourself, I would not recommend it, you really need the Mustang up on a lift. To get at the control arm bolt that attaches to the rear end can be difficult, the rear end must drop down a certain amount or you will have a very tough time at it. Even though we could have done this job at home in the garage, we chose to take our 2012 Mustang GT over to a auto repair shop and save a ton of hassle. The shop only charged us $100, it took them about 45 minutes and we were on our way.
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