If youve got a single or twin cans, with a back box it looks crap imo 
  
+1 I've got a K1 and a tucked bumper and it doesnt really work. Looked fab with my fujitsubo with a back box though  
  
  
ian, your old fujitsubo exhaust is so clean and shiny now you can see your face in it !  so with a tuck it should look sweet