Mud Flaps / Gravel Guards - Subaru BRZDesigned to protect your car from the sand blasting effects of rocks, dirt, mud, road debris, and whatever else gets kicked up from your tires. CNC cut from a unique blend of super durable 4. 5mm, polyurethane based sheeting. Our Mud Flaps Gravel Guards are rigid enough to protect your ride at any speed without flapping around, yet still very flexible and durable. Includes 4 custom cut mud flaps gravel guards, hardware, decals, and installation guide.