This Hurst tunnel patch kit is custom made for 1967-1973 Ford Mustang applications when installing a Tremec TKO 5-speed transmission. This 2 piece tunnel patch kit is constructed from 18-gauge mild steel and is pre-rolled and tapered to correctly fit the floor pan. The kit also includes a heavy cold rolled steel brace to replace and reinforce the floor bracing of the factory tunnel. Trimming and fabrication will be necessary when doing a transmission conversion.