Show the world your brand pride or highlight your personal style by adding custom or aftermarket semi truck mud flaps or semi truck splash guards to your Peterbilt 388. At 4 State Trucks, we carry a large selection of aftermarket parts and accessories so you'll be able to find the perfect set. Let 4 State Trucks help you personalize your ride by shopping online and finding exactly what you are looking for at a price that won't break the bank.