View Full Version : I want more sound from 03 Fatboy

04-12-2008, 12:38 PM
I have a 2003 Fatboy with two into one supertrapp exhaust. i bought it used and received no information as to the exact supertrapp model. I have a closed end cap with 21 discs installed. The discs that are in are vey sooty so i know that i am running too rich and will have to deal with that issue. However, this exhaust is quiet and I want more sound. My local dealer told me that i can add as many discs as i want and it is not going to make much of a difference. Is this true? Will an open cap, or a slotted cap, give me the sound that I am looking for? I don't want obnoxious, just more volume. I am very happy with the performance of the bike right now. Thanks!

04-14-2008, 08:17 AM
Try an "open" end cap, P/N 405-3046, for more sound. The open end-cap will flow for 10-12 discs. If you are running rich now, try 12-14 disc and the open end-cap, = 22-24 discs + closed end-cap.

05-12-2008, 05:32 PM
Remove the baffle & cut it off, reinstall with closed end cap & 24 discs. Plent loud and runs good too. You will need to pop rivet the top of the rest of the baffle that screws go into along with existing 2 screwws on bottom sides

05-13-2008, 06:59 AM
Keep in mind when you start altering internal parts (baffle/packing) performance may suffer.

05-13-2008, 02:11 PM
Thats not what the dyno says on mine, but its possable depending on your combo