Universal Shock Box | Custom Fiberglass Shock Box for Semi Trucks Premium Flat Shock Box for

Premium Flat Shock Box for Semi Trucks

Available with your choice of a straight edge or returned edge

these fenders are engineered to handle the demands of heavy-duty trucking

Built for durability and long-term performance

these fenders are ready to customize to match your build

Universal Shock Box | Custom Fiberglass Shock Box for Semi Trucks Premium Flat Shock Box forUniversal Shock Box Premium Flat Shock Box for Semi Trucks Enhance your truck's appearance with the Flat Shock Box, designed to deliver a clean, streamlined look while helping protect suspension components from road debris and everyday wear. Built for custom semi truck applications, this fiberglass shock box combines durability, lightweight performance, and professional styling. Whether you're building a show truck or upgrading a working rig, the Flat