Not sure which 2003 Ford Mustang Suspension Systems are right for you? We have over 2412 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Michael M from Corona, CA said, "Far better handling on my 03 Mach 1 than factory springs, but these Sportlines will need better shocks/struts to control the rebound. With factory shocks, the ride is punishing on California roads. No surprise there."