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Discussion Starter · #1 · (Edited)
For all you guys out there that have C-4 rear suspension installed or are thinking about it, ride is probably on top of the list for why you would do this sort of swap. I am with you, a properly installed and set up C-4 suspension can be one of the nicest riding and handling rear suspension systems on the market. We have been doing a lot of testing and tuning on our cars to try and get them as good as possible when it comes to ride quality. In our quest for perfection we have made a few discoveries, the first was that urethane bushings are not the best answer for refurbishing your suspension. What we found is that the urethane bushing that are installed into the 12 pivot points of the rear suspension create so much resistance that it more or less freezes it up. With the suspension unable to move it then transfers every bump into the car giving you a harsh "buck board" ride. Most people have written this off to "sports car" suspension and ride, but this is not the case. It is just a suspension system that has too much resistance at the pivot points which is not letting it move freely through its travel.
What we have come up with is a kit that uses a spherical bearing in the pivot points eliminating the resistance. We call this our "Free Action Bearing Kit". With this installed you can now tune the cars ride with a shock and spring to make it feel how you want it to!

Check out the video i made showing the difference between the urethane and our bearings. http://www.youtube.com/watch?v=6qgAXtVCauY&feature=c4-overview&list=UUE9Qh73-UBE8GmzaM8JlXVA
 

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Discussion Starter · #4 ·
We still need to install them because the stock links are all over the map on their tolerances (the rubber that came stock didn't care). We make sure the aluminum housing that gets pressed into the links are the correct size for the hole and dont stress the bearing.
 

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We still need to install them because the stock links are all over the map on their tolerances (the rubber that came stock didn't care). We make sure the aluminum housing that gets pressed into the links are the correct size for the hole and dont stress the bearing.
For those of us that have the ability to machine our own, can they be purchased as a package.
 
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