[DaveC113]

The oem radius/tension arms seem much beefier than SPL. I may replace the rubber bush with a spherical though...

[DeuceCam]

Are the rubber bushings stiffer on the FEA arms (compared to FE3)?

[cdb95z28]

Originally Posted by DeuceCam

Are the rubber bushings stiffer on the FEA arms (compared to FE3)?

I would think so. The ZLE has a lot more loading than an SS.

[Msquared]

Originally Posted by DaveC113

The oem radius/tension arms seem much beefier than SPL. I may replace the rubber bush with a spherical though...

While I'm sure they are beefier in bending, those links only ever see tension and compression loads, so they don't need to be beefy in any other direction than that. That said, if a rock or other heavy object ever hits the tubular SPL link, it could ding it a lot easier than the stock solid aluminum piece, and that would render it much weaker, especially in compression. So for a long-term street-driven car, it makes sense for GM to use solid aluminum links.

[dpevans]

Originally Posted by N Camarolina

I'm trying to learn here. Why the SPL bushings in the FEA arms rather than the OEM FEA bushings? How easy was it to swap out the bushings?

SPL uses bearings not bushings. You also have an endless amount of adjustment over the stock arms. If you lower your car you'll need adjustable tie rod ends to eliminate bump steer.