This could be a dumb question, however in my 2003 parts manual there are 2 part numbers for front & rear velocity stacks. One part has HDI 98 h.p. and the other has 115 h.p. Does the h.p. mean "horse power"? Also If purchase the 115h.p. stacks and re-tune, am I likey to gain any additional performance?

This could be a dumb question, however in my 2003 parts manual there are 2 part numbers for front & rear velocity stacks. One part has HDI 98 h.p. and the other has 115 h.p. Does the h.p. mean "horse power"? Also If purchase the 115h.p. stacks and re-tune, am I likey to gain any additional performance?
if you re-map with the U.S.map you will! :cheers:
(h.p. means what you said)

if you re-map with the U.S.map you will! :cheers:
(h.p. means what you said)


Not so. The Aussie bikes are 115 hp stock, thus you already have the 115 hp stacks.

Read this thread.

http://www.v-rodforums.com/forums/showthread.php?t=178


John