Related Photo Galleries
On unibody cars, any point where the rollcage intersects the floor or trunk must have a 6x6-inch steel plate (0.125-inch thick) welded to the body. Since floors are seldom flat, NHRA rules allow bending the plates to follow the contours of the body. After grinding away the paint, the mild steel plates were welded to the floor. Chrome-moly joints must be TIG welded.