control arm bushing ???

I just recieved my Prothane control arm bushings. I was wondering if there is a reason that only three of the upper bushings have a chamfer on the larger side. Also, on the larger of the two lower bushings... only one of them has a chamfer on it. It is also a little shorter than the other one. Does this all sound right??? Any tips will be great.

Josh

wow.. no one on here could help... I will just give an update incase anyone else has this problem.. All four upper control are bushings should be identical. The lower control arm bushings are different. The fronts on the lower are the same but the rear are different. The drivers side actually has a cap that goes on the bushing so it needs to be flat unlike all the other bushings. Called up Prothan and they are sending me a new one today. Guess I want have it all back together by this weekend...

I used the red prothane bushings and I noticed the same on mine and I installed them with no issues.

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I've never replaced the bushing. Just the whole arm