Rancho 2" Sport Lift

Hey guys I was just curious why it is that the Rancho 2" Sport Lift doesn't come with a rear track bar relocation bracket? Is it not needed? Don't the front and rear axles shift? I've heard of people gaining around 2.5". Any info would be greatly appreciated.

2" probably isn't enough lift to warrant an entire part to fix something that will only be off ever so slightly and won't affect much at all.