Hey guys, I never heard a full muzzy 4 into 1 on a BUSA so I dont know if they sound deep or tinny sounding? I bought a good used full muzzy on ebay and the guy told me he took out the packing in the rear portion of the canister, he said it sounds awsome?, Maybe to him, to me it sounds tinny and pretty loud. My wifes yoush TRS slipon sounds perfect on her FZ1. Buy since most people here seem to like the muzzy I went for it. So do you guys think its just because some or maybe all? of the packing is out of it? I also installed the BMC filter and block off plates and left the air box stock for now and I noticed a lowed loss and of course the fueling doesent seem rite,I dont want to sacrafice the great lowend this bike has, one of the reasons I traded in my new 06 FZ1, was because even with all the mods I did to it, my wifes modded 02 FZ1 would run away from it under 4,000 rpms (plus other reasons). So I guess ill be getting a PC3 this week or next, any one got a great map for a full muzzy,bmc drop in,smart tre, and blockoffs? Thanks.