I called Hellwig tech support about the rear bars and mentioned about the spacers and he said that I did need them and sent a set out. I will let you know during the install, if that is the case or not. 'Only the shadow knows', haNO you do not need any spacers
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Had to wait long enough, but the front bar arrived last night. I will try to get on this install today
Install notes: No spacers needed, you could have installed upside down and still had plenty of room