I was looking at the whoosh ones https://whoosh-motorsports.myshopif...powerflex-fiesta-st-rear-coil-spring-pads-set since my drivers' side rear spring appears to be making a banging noise. I can take it in under warranty, but if swapping to this purple dealy fixes the issue permanently it might be a better idea.
Realistically, how hard are these to install, and will I need a new alignment afterwards?
Realistically, how hard are these to install, and will I need a new alignment afterwards?