I was asked to post my info on LCA installation on this thread.

For the lower control arms:

K996 341 121 90
K996 341 122 90
K996 341 441 90 (2)
900 076 025 02 (4)
999 025 269 02 (4)

Shims (buy in pairs):

K996 341 543 90
K996 341 543 91
K996 341 543 92

Front sway bar:

K997 343 701 91
996 343 792 16 (2)

Keep in mind:

1. Use your original diagonal control arm that attaches to the lower control arm, but shim it with cheap washers equally on top and bottom to make up for the difference in the thickness of the mounting point on the new LCA.

2. You may need to get more or less LCA shims, depending on what you are after.

3. The sway bar requires adjustable links to fit our cars- I made my stock pair into adjustables, but you may want to find aftermarket units.

4. LCA parts: $640, Sway bar parts: $150

5. You will need an alignment after this! The car will be unpleasant and dangerous to drive without it.

My current alignment is

front: -2.2 camber,1/16" total toe out
rear: -1.5 camber, 1/16" total toe in

This will be modified soon.

The stock diagonal brace works fine and avoids $2-300 in costs.

There is no sensor attached to the lower control arm.

Hope that helps!

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996 GT3 lower control arms at all corners
997 GT3 front sway bar
Tarett rear toe links
Quaife TBD
DMC harness bar/G-force harness