Suspension mods ruining your car? or improper installation?
 

A lot of people commenting that the spring clamps are for removing the springs - this is not the case, the clamps shown (I'm as surprised as you are) are to remain in the car, to lower it. They're labeled as "lowering clamps" on the packaging. Spring compressors are much larger, so you can clamp more than just one spiral of springs. As a side note, most auto parts stores will let you rent springs compressors for free, if you're ever in need. Have a great day everyone!

かんぐちあき
"lowering clamps"...So that's what they were! Just recently bought '00 Maxima that desperately needed new tires, and when tire people were changing them today, these guys fell out from under my car, apparently from the springs. I think the springs and struts are damaged already and mechanic warned me I better find used stock struts WITH springs right away, or my new tires will get damaged real soon. He couldn't even properly do the alignment on my car because of these silly lowering mods :( No wonder the handling felt so bad...

3rd World Garage
Xeno Well, no. You are moving the forces further from the hub and putting more stress on the studs and may also compromise hub centering on hub centric wheels. Additionally, the center of the tread should always be centered between the two wheel bearings so that the forces remain balanced. Using a spacer may screw this up and cause premature failure of a wheel bearing.

Drew W
Whether you're on airbags, springs, or magic and unicorn dreams, a sway bar ties the left side of the car to the right side. If you're not off-roading over rough terrain, having sway bars vastly improves stability. watch?v=_liGnV3PTiQ

Alex M
I just want to throw out one thing that wasn't considered as an ADVANTAGE to a beefier sway bar. For NON-racing applications (like a daily driver), hollow and lightweight sway bars have a tendency to severely rust right through (especially on GM W-body cars due to placement and sway bar design), resulting in the need for replacements more frequently than a solid bar and potentially dangerous and unexpected compromise to the steering once it suddenly gives. In daily driving understeer is very unlikely to ever occur, so the trade-off for slightly higher chance for understeer in return for something that will last the life of the vehicle, increase safety, and reduce roll may be worth considering. In my opinion however, the "beefiness" of the bar itself isn't very important so much as the sway bar END LINKS. The amount of "give" the bushings on them have will affect roll, slip angle, cornering feel, grip, under/oversteer, and suspension independence far more than the bar itself. The stiffer the bushings, the lesser independence of the suspension and the lesser the body roll.