I have assisted with a number of different brands of spring installs. Seems like the guys with sprint springs have had some issues with squeeking and low speed (maybe you guys with them can chime in). It's supposed to be a better auto-x or track spring though. I have H&Rs and my only complaint is that I feel they are a bit bouncy on the interstate with the stock strut. I think they would be much better with some Koni Yellows. I haven't heard from the guy with Eibachs. His must have worked out pretty good but they don't drop the car as much.
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Slightly modded
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