2015-2023 S550 MustangMustang News First 2018 ROUSH JackHammer produced What is the ROUSH JackHammer Mustang? For 2018, ROUSH Performance will only produce 200 special edition Mustangs called the JackHammer. The ROUSH JackHammer Mustang is a "to be supercharged" Mustang…Jaron ColeJune 16, 2018