I just installed an HMF slipon and the race ecu. Talk about loud! I have several Harleys and a stage 7 Vmax with a kerker 4 into 1 and they aren't near as loud as the 1125 with the HMF slipon. All of you guys using this exhaust are ok with the dB level? I haven't seen any info on quiet inserts for the muffler.