It will be noisy once a little moisture gets in there. Also, it will increase the wear of the spring seats and the ends of the spring. Pads will not significantly increase your car's height. If you want it a little lower, put some extra weight in the car. They were designed to serve a purpose. They will not do this if they sit in a box in the garage. Ask yourself this question. Does Carlsson recommending installing their springs w/o pads???

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Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.