I currently had a Thunderheader installed on my 2010 Fatboy LO. We used exhaust wrap and the clearance between the rear Master Cylinder pivot point (where the lever connects) and the Thunderheader was very close. I drove the bike for about 400km when the back brake began locking up. I changed out the entire brake system Master cylinder, line, caliper. Im starting to believe that the exhaust is eating up the fluid through the pivot point of the master cylinder. Has anyone on here ever had this issue ?