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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?
 

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Isobaric said:
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)
 
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