From the factory, Ford uses rubber bushings throughout the Mustang's suspension. While rubber bushings aren't the best option from a performance standpoint, they do help keep the cost down and provide a smoother ride by controlling what's called NVH (Noise, Vibration, and Harshness). Keep in mind many Mustang owners never modify their car, so Ford's use of rubber bushings makes sense in that regard. Since rubber bushings suffer on the performance side, they're a contributor to wheel hop.
If eliminating wheel hop is a priority, then replacement bushings should be a priority. While there are a few different types of materials available, the most commonly used is polyurethane. Polyurethane bushings will provide a much firmer feel than factory rubber pieces and, when properly maintained, will outlast the stock components. While not the stiffest bushings, they're an ample upgrade from the factory rubber. They give slightly more NVH than rubber bushings, and they do need to be greased every few months, however. These are fantastic for a daily driver.
Spherical Bushings: a better type of bushing than poly, they are fantastic for drag launches and perform quite well in all applications. Their main drawback is simply the amount of increased NVH, primarily the noise. For a daily driver they are not optimal. The noise tends to get quite irritating. That being said, many use them without complaints.
Aluminum: similar to poly bushings, they’re great all-rounders. They're stiffer and have a little more NVH than poly bushings. While it takes a little bit of time, they are susceptible to corroding as well. If you're a road racer though, they can withstand much higher temperatures than rival bushings, fantastic for when the rear end generates a lot of heat.
S550 IRS bushings are crucial for owners aiming to drag race their pony as they take a lot of slack/slop and play out of the suspension. The stock bushings allow rear subframe movement that can ruin a quarter mile time. Aftermarket IRS bushings help the S550’s rear feel more solid and planted, especially when taking off from the line.