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I just did a set about two weeks ago and I can't remember for sure but I'm 95% sure the longer one are for the rear. The factory rear hose is almost too short from the factory. I would start with the front and see if the short ones fits OK, I think there is plenty of room up front. You can bolt them up without the copper washer to see how they fit, just don't tighten down on them without the washers, only snug them up a little to test the fit.