I spoke with my contact at Classic Accessories and the Quick-Fit UTV Bench Seat Cover, # CA18033, is made to fit seats that measure 41-1/4 inches long by 17 inches wide and backs measuring 44-3/4 inches long by 10-3/4 inches high. I have attached a picture that illustrates these measurements.
Since they have not been able to test these covers on a 2003 Kawasaki Mule 550 KAF 300C, we can not guarantee that they will fit. I recommend taking a measurement of your seat and seat back to see... view full answer...