I think it might be a good idea because the car is carrying a motor now that is 75 lbs heavier than the D15 that was in there before. Kinda like what people do when they put a H22 in an EG. I'm looking to get brand new performance shocks/springs in the very near future, but before I go ahead and buy them I wanted to see if this might be a good idea. Especially since it's really hard to find new springs/shocks for a Civic Si-R II. And I can't read Japanese to search their automotive parts sites.