Thank you for the question... just an FYI, we were selling Sumo Springs for several years before we developed the DuroSprings... the DuroSprings were designed to be easier to install, simpler construction and a more tuned response to our overall suspension system.
Point taken. LOL.
However, in the wide world of suspension systems, there are only a few manufactures that cater to our industry. Eibach is one. Betts out of Fresno is another. And there are one or two on the East Coast.
However, since our coils are a proprietary design that requires...
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On 2021+ diesels the crossmember is slightly different height. Flipping the bushing solves the problem.
Instructions specify this and give a torque spec - shop may have missed that.
@Bonanza we appreciate the feedback. First, it is important to note that these are not replacements for air bumps. Different tech with different intentions.
These are improvements over stock jounces... and when fully compressed, they are about an in taller then a fully compressed stock...