At 9,000 miles, after putting strut brace on the front, I wondered what a bigger bar on the back might do. The 2009 and up Fusion has a welded suspension carrier, unlike previous years that bolted together. I ended up taking the car to my local Ford dealer for the install, as the exhaust had to drop and the car had to have about 28" of clearance to fit the bar in place. The results are astounding. Still, with stock Continental 16" rubber, I can sail around 30 mph ramps at 50 mph with dead steady and flat cornering. My Fusion is only a 2.3l, but it drives like a BMW 5 seires now. The Ford tech who installed the bar told me he had put one on an MKZ and the guy didn't like the harsh ride, but I don't have any harshness, just flat and level ride all the time. No wallow, no dip and no sway. It did stiffen things up a bit in the rear, and I wouldn't want to not have the strut tower brace, but this is a nice addidtion that gives my Fusion more spunk on the go.