if your new arms will drop in without modifying the upper arm mounting points, its worth the effort. if you have to hack a bunch of stuff off, its up you. You'll get an addtl minimal amount of neg camber gain in bump. Probably more beneficial with stock height springs etc. i dropped the CPP tube a arms in the G mod with no modifications at all.
The after market control arms may add camber, but do nothing for you other wise.
Doing the g-mod with aftermarket arms is usually easier than with stock ones because you don't have to chop down the top of the mounts.
Run a search on the g mod and tubular control arms, should find a lot of good reading.
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