I've had my 2015 Mustang GT for about four years and it's always been a blast, but lately I've noticed that the rear end feels super bouncy, especially on the highway when I hit those undulating sections of road. It almost feels like the car is pogoing up and down for a second or two after a bump, and it's starting to make longer drives pretty uncomfortable. I took a look underneath and the rear shocks definitely look original with over 100,000 kms on them, and I'm pretty sure they're just worn out at this point. I've been reading up on mustang shock absorber treatment and trying to figure out whether I should just go with OEM replacements or upgrade to something more performance-oriented since I do like to take the car out on weekends and push it a bit. I found a shop that specializes in Mustang suspension work and they mentioned that on these S550s, the rear shocks tend to wear out faster than the fronts, especially if the car has been driven hard. I'm leaning toward doing all four corners just to get everything fresh, but I'm also wondering if upgrading to adjustable shocks would be worth the extra money for the kind of driving I do. Has anyone here replaced their Mustang shocks and can tell me how much it transformed the ride and handling? I just want to get that planted feeling back without making it too harsh for daily driving. Any advice on brands or what to expect cost-wise would be really helpful.