I was told the same thing by AR design. They say the lower connection on dp is a slip fitting instead of bolting up after 4/11 production date. I have asked other manufactures and they say otherwise. I am not sure what to order. I have akropovic evo system and had no issues, so DP shouldn't be a issue either. I believe DP for 550 are the same and am wondering if the 550 changed but not the x5m or x6m. Any input is appreciated.
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