I don't have em at the front, u don't get shit all over your doors. Just a bit of mud at the bottom section neer the weels. Its not that much mess, I just keep cleaning my car once a week. Besides, heeps of cars don't have em with kits, r32,-3-4, Silvia, and others. If u take the flap of the back, there is a massive gap between your skirts and bumper, at least with mine ayway since it's a corsair rear bar. Eventualy im fiberglassing my bumpers and geting rid of the flaps alltogether for i main reason: U get lower clearance without em.