Do I have to take off the sub-frame to changes the front sway bar on a 99 Buick Century?

the sway bar doesnt need any sub frame removed its actually pretty easy but the arm is best done with the front end lifted but not fully where the tires are off the ground. you see its a large spring of sorts and its got a nuetral spot where removal and install is pretty easy. if on the ground its sprung if raised fully its sprung, hope this helps. remove the end grommeted ends at the a arms 1st then the frame mounts.
 
the sway bar doesnt need any sub frame removed its actually pretty easy but the arm is best done with the front end lifted but not fully where the tires are off the ground. you see its a large spring of sorts and its got a nuetral spot where removal and install is pretty easy. if on the ground its sprung if raised fully its sprung, hope this helps. remove the end grommeted ends at the a arms 1st then the frame mounts.
 
Ken, It's not necessary to drop the sub-frame. Jack the car up and remove the front wheels. Put the frame-rails on jack-stands as high as you can get it, even with the lower ball joints. Remove the sway-bar end links and the two bolts that clamp the sway bar to the front frame rail. Swing the ends of the bar rearward and it should pull out from either side by twisting a little.
 
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