This laser-cut Hurst tunnel patch kit is custom made for 1964-1966 Ford Mustang applications when installing a Tremec TKO 5-speed transmission. The tunnel patch kit is constructed from 18-gauge mild steel, is pre-rolled and tapered to correctly fit the floor pan and comes with pre-drilled holes for welding to the floor pan. The kit also includes a heavy cold rolled steel brace to replace and reinforce the floor bracing of the factory tunnel and includes a CAD drawn template for properly trimming the floor hump for the new transmission. Note: Trimming and fabrication will be necessary when doing a TKO/TKX transmission conversion.