Do you need an alignment after?I just installed these on my 2022 Bolt and it gave me a 1.5" lift to my front end. This definately improves my clearance and avoids parking blocks from damages under my front bumper. Super easy to install and tools were not necessary. Just some greese. These clear speed bumps effectively, too. Steardier and well balaced on curves. I can't tell you guys anything on aero dynamics. But, I don't believe the effect will be too detrimental. My Bolt is just a city commuter. Not a freeway extreemer. They are: 2pcs A Style Car Auto Shock Absorber Power Cushion Buffer Special Spring Bumper obtainable either on Ebay or amazon. Hope this benefits some of you.