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From the website, Eibach is thicker because it's tubular, so it's not necessarily stiffer compare to a solid Progress bar.
 

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*The Electrician*
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Love my progress bar, its been awesome.
 

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2018 Mazda 3 GT
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Here is a side by side of the OEM RSB and the one from the Progress Group. The Progress RSB is very strong and well made. I'd be amazed if this thing ever failed.

They are also both sized the same. 28" from outer edge to outer edge. The stoppers are 20" from outer edge to outer edge.

The stoppers for the brackets are welded on, instead of screwed in place, like CS. The OEM ones have a plastic ring.

I will make some measurements on the CS bar, once it comes out, and take pics comparing it to the OEM bar as well.
CK
 

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