Catering chiefly to USAC's Championship Car Division, Fried and Gerber had the track's layout reconfigured to a "D" shape in 1965 by building a straightaway across the back stretch and paving over the uneven dirt surface with asphalt. However, as suburban growth engulfed the speedway with Levittown being built up around the area, the offers from developers became too tempting to refuse. Fried and Gerber announced the sale of the property to mall developers in 1967, but the speedway held on through five more seasons. The final race held at Langhorne occurred on October 17, 1971, with Roger Treichler claiming the win at the national open for modified stock cars.