Im reading the features list on the 2012's and what is one millimeter increase on the stabilizer bar on the 5.0 going to do for the ride quality?
I guess I really dont know what the stabilizer bar actually does. Sorry for my ignorance

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SUSPENSION
Front
Independent 5-link design with SACHS ASD gas shock absorbers, coil springs and 25-mm stabilizer bar (26mm stabilizer bar for 5.0L V8)
Rear
Independent 5-link design with SACHS ASD gas shock absorbers, coil springs and 18-mm stabilizer bar (19-mm stabilizer bar for 5.0L V8)
Stabilizer bars are also known as "anti-roll bars." Basically they try to make the car body resist leaning while cornering. Imagine a wide "U" shape with the ends of the "U" connected to the
wheel hubs. The base of he "U" runs through a pair of pivot loops attached to the car body. If the wheels go up/down over a road bump together the ends of the "U" just go up/down with the wheels. However, if one
wheel tries to go over a bump while the other
wheel is on flat pavement, the "U" has to twist a little. The "U" then acts like a torsional spring resisting that movement. Now imagine driving around a sharp curve... the car body wants to lean over. What that does is make one
wheel seem to go up while the other goes down, twisting the "U" a lot. It resists this - keeping the car body from leaning as much.
A larger diameter bar is stiffer so the vehicle will have more resistance to body roll BUT will react more when only one
wheel hits a road bump/dip.
Modern cars have "independent suspensions" which basically means each
wheel has its own links to the car body... thus when one
wheel moves up/down due to road bumps, it doesn't make any other
wheel move as well. Picture the rear axle assembly of most pickups: that's NOT an independent suspension. That type of suspension is called a "solid axle" suspension... and when one
wheel rides over a bump, that end of the axle goes up with the
wheel, tilting the whole axle a bit. That tilts the
wheel on the other side so it no longer rides flat on the pavement - not the best for handling or ride quality. Also, that big solid axle is heavy - once it gets moving from a bump in the road its inertia will want to keep it moving - so it transfers that energy to the car body making it move more. The "links" of an independent suspension are much lighter - lower inertia - so they transfer less of the bump energy to the car body.
mike c.