A Great Car Starts With a Great Frame

Today’s fourth-generation Mk4 Roadster frame has benefited from over 15 years of refinement and development. It is both lightweight (321 lbs) and strong. We use high quality precision cut plate steel with 1010 and 1020 DOM tubing. The Mk4 frame stands head and shoulders above the original 1965 legend thanks to better tools, better materials, and modern technology.

• The Mk4 chassis features a beautiful round tube front X-member which helps make for an authentic and strong chassis.
   

• The 4” round tube main rails are made from higher quality steel and are thicker than the original frames: 0.120” wall DOM (drawn over mandrel) tubing, up from .095” in the original 1960s frames.
   

• Engine, transmission and suspension mounts are ready to accept bolt-on components.
   

• Plate steel is laser-cut from high quality A-36 steel stock.
   

• Hood, doors and trunk are all hinged to the structural frame, not the fiberglass body.
   

• The dash/cowl hoop is 0.10” thick wall steel, welded to the frame as part of the cockpit surround cage. Many fiberglass bucket replicas have a flimsy dash hoop bolted to the floor.
   

• The driver-side roll bar is higher and stronger than the original, with passenger-side mounts on every frame so you can add a passenger roll bar anytime.
   

• We added a backbone section to the original ladder design and extra perimeter tubing that more than doubles torsional rigidity of the Mk4 frame over the original.
   

• Triangulation bracing has been added to the front suspension, vertical supports, dash, rear sub-frame, and trunk.
   

• The cockpit and footbox areas feature a steel cage surround structure taken directly from our NASA racing series.
   

• Welded steel side impact bars, door steel, footbox, and cockpit dash hoop surrounds help make the Mk4 frame far safer than original cars.
   

• Front and rear energy absorbing crumple zones help protect driver and passenger.