are you refering to the newer stock version that is just above the starter? i was looking at a new bike and it does seem pretty hard to convert over since the oil lines dont run out of the motor in the same place so im sure custom lines would need to be made.
they do make the aftermarket ones that run down parallel to the frame, but i wouldn't think that is what you are asking about since they were made for these bikes(i think anyway)
2007 Hammer S 100CI
S&S air cleaner, PCIII, SRVT clubs exhaust, Avon grips.
2006 Kingpin 100CI
stage 1, touring setup to come soon...nm bought a XC.
2013 Sunset red and black XC