These shocks were used on light duty Ranger pickups back in the day. This old school hot rod guy who owns this run of the mill auto repair shop swears they are a must have on A-bodies with stock suspensions. I am no suspension guru but I'd guess they slow the compression. All I know is Misty goes fast and can go around a corner now without feeling like she's gunna flip over! Best part is, my high school car went fast and felt like it was gunna flip over and I liked it....