20-01-2014, 09:06 AM
(This post was last modified: 20-01-2014, 09:06 AM by Slam Wagon.)
Changing the lower one in theory should help. How much it will help im not sure as you will still have two solid ones. Theres a thread about the quality of the power flex ones though, might want to look at either oem fitted at 90* or the vibra technix one.