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Easy breezy.

Front:
Get your wheels off the ground so the car is in full droop. Remove the wheels. Install the front bar (lithium grease on the bushings) Attach the drop links and work the adjustment back and forth until you find the ideal length with no pre-load. Tighten the lock nuts making sure the swivels are at right angles. I like my front full soft but your mileage may vary.

Rear:
Full droop, wheels removed. Loosen the bolts and just twist and turn the bar until it slides out one side. Run the new bar in the same way. Adjust the drop links same as above. I like my rear 1 off full stiff but your mileage may vary.

Now go drive the car and re-check your lock nuts in a few days. I did have one work loose once.