I recommend ordering the larger side. I originally got a red "A-" for the front. It was better, but it just didn't do what I was hoping for. I then ordered a black A and tried it on my front end and it filled the spring much better and was more efficient. But I would still hit rock bottom on that particular hitting sequence. I didn't think the red "A" would fit in the back. However, it filled the spring quite well. I ran into the same bumps when I was 60. And I didn't hear the rattle. In addition, they improve handling and cornering. All for $80 front and back. Obviously, you'll get the best result with $1,000 in suspension parts. But they were really cheap, readily available. By the way, the wheels don't have to be removed. But yeah, go big or go home, blacks don't cost that much on my Impala. They probably only added about 1 finger lift and I don't see them on the floor. Good balance between cost and quality
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