40in Steel Fenderwells

The 40in Steel Fenderwells from Competition Engineering are purpose-built wheel tubs designed for serious street and strip builders who need reliable clearance for larger tire-and-wheel packages. Whether you're installing oversized slicks for drag racing, upgrading to modern performance wheels on a classic platform, or simply gaining the suspension articulation needed for lifted applications, these fenderwells provide the structural integrity and precise fitment that separates a quality modification from a botched job. Competition Engineering's reputation for hard-part engineering makes these a trusted choice for fabricators and enthusiasts tackling extensive chassis work.

Manufactured from 24-gauge steel with a beaded construction for added rigidity, the 40in Steel Fenderwells deliver both strength and light weight—critical when every pound matters in performance builds. The beading process cold-forms the metal into reinforcing ribs, dramatically increasing torsional stiffness without adding bulk or compromising fitment. At 40 inches in diameter and 20 inches high with a 23.25-inch width, these tubs accommodate substantial wheel-and-tire combinations while maintaining proper suspension geometry and brake access. The natural (uncoated) finish allows you to integrate these into your build using your choice of welding, epoxy, or mechanical fastening, and permits custom finishing to match your vehicle's interior or underbody treatment.

These fenderwells are ideal for hot-rodders, drag racers, and restoration specialists working on vehicles where OEM wheel tubs have become a limitation—typically 1960s–1980s muscle cars, early trucks, and custom platforms. Installation requires welding skills and familiarity with body panel geometry; plan for several hours of fabrication to achieve proper alignment, clearance testing, and finish work. Sold as a pair to ensure symmetrical fitment on both sides, the 40in Steel Fenderwells will transform your vehicle's tire clearance and give your build the professional appearance that reflects your investment in quality parts.