I recently came across a video of these Sulastic Shackle Springs. I'm very interested in getting them in the future. Has anyone ever tried them? I have a half ton but anything that helps the ride when driving unloaded is a plus. They cost $400. Looking for some thoughts or feedback or similar products you guys have used.
Thanks

Video that sparked my interest is here.

 

If they were $200 I'd buy a set for our 95 dodge and try them. The shackles are rusted and need replacing before they break. I wonder if they have shackles for the front axle of my daughters 87 Chevy?