I just got my 20" extensions and ordered some sansom baffles . the extensions should be back from the chrome shop about the time the baffles arrive. I'll let you know how it works out. mine are just like yours- 36"-loud!- and no low end.
2002 Bandit 1200/ GSXR cams/ 1277 BB Kit/ Holeshot header and can/ 38mm flatslides/ a good head/lotsa hp/lotsa tq- lots of rear tires...