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I've seen something like this before... But in blue... Not sure what brand and what it does... Not a big fan of brands that I never heard of...
 

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These are probably heavy as heck, although they do have spherical mounts which is a good thing only for track.

My vote is for GS aluminum uppers.
 

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The stock arms are actually well designed fully boxed sheetmetal, I would argue is much stiffer than these tubular ones.
Completely agreed with that.

Stock arms with GS400 arms comparison:
 
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