Full Length subframe connecters that are welded into place work the best. I use the Maximum Motorsports Chassis setup. Go to
WWW.Maximummotorsports.com
I have a 90 coupe that had a lot of hard miles on it, once I installed the subframe connectors, g-brace & strut-tower brace it made the car much stiffer and handle much better.
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89 (GR40 Griggs)LX
89 LX Coupe
90 LX Coupe