I purchased a 2006 Night Train - new. Had a HD High Flow breather and Vance Hines Staggered Shots fitted from new and the ECU mapped to suit. Have now just fitted a Screamin Eagle Heavy Breather. Question: Do I need to have the ECU re-mapped or should it be ok considering it was set up for the HD High Flow? Steph.

Thanks Skull. Will go with it the original mapping.